Passage People Sometimes Dance for Joy, or Report That They Are

Passage
People sometimes dance for joy, or report that they are so happy that they could dance for joy.  However, one might wonder why this is so.  What is it about happiness that would lead someone to dance?  What exactly is dancing, when one ponders this activity that might otherwise be taken for granted?  Is it only a human practice, or is dancing something in which other animals also engage?Indeed, some animals do seem to dance, although their reasons for doing so are goal-based.  For instance, bees dance to provide information to other colony members, using complicated movements to describe the location and quality of a food source.  This behavior is not emotive; it would seem odd, if not unscientific, to ascribe an emotive character to such displays.  Nevertheless, these displays are communicative, as are emotive human behaviors.Might this similarity bespeak a common evolutionary basis for the dance of humans and other animals?  Perhaps, although there are differences which cast doubt on that hypothesis.  A bee's dance is its main method of communication, whereas most human communication is vocal.  Even with non-vocal communication such as sign language, the types of bodily movements are qualitatively different than those used in dance, as dance movements signify at most a general feeling or impression rather than corresponding to specific words or ideas.  If the bee's dance functions like human sign language (albeit in a much less sophisticated form) , it is questionable whether it is an appropriate analogue to human dance at all; the term "dance" would be simply a weak metaphor.  If the bee's dance is a type of language, then it is not the same sort of thing as human dance.Still, there are other types of animal behaviors that might more aptly be called dances.  Many animals engage in courtship displays of varying complexity, in which carefully choreographed movements are designed to win the favor of a potential mate.  Historically, a connection between human dance and courtship has also been assumed, and often cautioned against.  For instance, in the 1950s Elvis was denounced by parents as a corrupting influence upon the young women who swooned over him, and some of his dance moves were censored.  People often voice similar concerns with regard to the behavior of crowds in nightclubs and explicit lyrics in popular music.  Many believe that such an outcry may also be heard in the future, as the struggle of parental restraint against youthful vigor continues.It should not be thought, however, that all amorous dancing is subject to condemnation.  Weddings include dance as a matter of custom, suggesting a long-standing endorsement within socially approved couplings.  Through social tradition or natural instinct, dance seems linked with romance in the human mind.  Nevertheless, such a connection is clearly not the whole story.  One of the most fundamental uses of dance is the physical expression of music-a language not of words, but emotion.If music expresses emotion and dance expresses music, then, do we dance not only "for joy" but for all emotions?  Seemingly not, but why?  Certainly music itself conveys a wide spectrum of feelings.  Although we do not dance "for sadness" or "for anger," we do droop our bodies or clench our fists, and perhaps more subtle emotions produce other physical markers.  Still, happiness too can be seen in a smile, and to actually dance for joy is comparatively rare.  Is dance then truly an entity unto itself?  Or, is it merely one instance of a wider class of physical behaviors?
-The ideas in the passage would be most relevant to the work of:

A) a sociologist examining human nature.
B) a zoologist studying animal behavior.
C) an ethicist discussing moral values.
D) a historian describing generational differences.