Sociology Can Be Defined as the Systematic and Scientific Study

Sociology can be defined as the systematic and scientific study of human society and social behavior. Given this definition, what level(s) of social structure listed below best describe(s) what sociologists might examine?

A) only small groups
B) almost any level-from interactions between two people to large-scale institutions
C) mass culture and large institutions
D) relations between individuals
E) large-scale social structures that involve significant numbers of people