PT 64 S4 Q15

According to passage B, which one of the following is an example of a human ... ...

According to passage B, which one of the following is an example of a human characteristic for which evolutionary psychologists propose a questionable explanation?
(A) the early human tendency to live in small communities
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Oct 2011 LSAT (PT64): Reading Comprehension