Antibiotics are standard ingredients in animal feed because they keep animals ... ...

Antibiotics are standard ingredients in animal feed because they keep animals healthy and increase meat yields. However, scientists have recommended phasing out this practice, believing it may make antibiotics less effective in humans. If meat yields are reduced, however, some farmers will go out of business. Which one of the following is most strongly supported by the information above?
(A) If scientists are correct that antibiotic use in animal feed makes antibiotics less effective in humans, then some farmers will go out of business.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Oct 2012 LSAT (PT67): Logical Reasoning A