PT 14 S2 Q7

All zebras have stripes, and the most widespread subspecies has the best ... ...

Which one of the following, if true, most strongly supports the conclusion regarding a signaling function?
(A) The subspecies of zebras with the best defined stripes is also characterized by exceptional size and vigor.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Practice Set: "Stronger" Questions, Set 1