Recent medical and anthropological data show that prohibitions on the use ... ...

Recent medical and anthropological data show that prohibitions on the use of certain foods served important social, economic, and medical functions in ancient cultures. But these data cannot explain the origin of the prohibitions involved, since those who originally adopted and enforced them did not have access to the same data as modern researchers.

Which one of the following is an assumption required by the argument?


(A) The origin of a food prohibition must be explained with reference to the understanding that the people who adopted and enforced the prohibition had.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in PT70 (Oct 2013): Logical Reasoning B