Research on the Idea of "Family Resemblance" Has Demonstrated That

Research on the idea of "family resemblance" has demonstrated that

A) in a family resemblance category, there must be at least one attribute that is shared by all examples of that concept.
B) a prototype is equivalent to a family resemblance category.
C) in a family resemblance category, each example has at least one attribute in common with some other example of the concept.
D) family resemblance categories are artificial, and they are found more often in the laboratory than in real life.