With Regards to Category Members, Which of the Following Best

Multiple Choice

With regards to category members, which of the following best describes what is meant by "family resemblance"?

A) All members of the category will appear similar to each other
B) Two category members will share some features with each other, but other features with other category members
C) Category members may not always appear superficially similar, but have an underlying structural similarity
D) The internal structure of categories can be fluid and difficult to define