Critical Reasoning

All zebras have stripes, and the most widespread subspecies has the best-defined stripes. The stripes must therefore be of importance to the species. Since among these grassland grazers the stripes can hardly function as camouflage, they must serve as some sort of signal for other zebras.

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 strips is also characterized by exceptional size and vigor.
(B) In certain tall grasses zebras can be harder to spot than grazing animals with a coat of uniform color.
(C) A visual signal transmitted among the members of a species can consist of a temporary change of color perceptible to other members of the species.
(D) Zebras react much faster to moving shapes that have stripes than they do to moving shapes that are otherwise identical but lack stripes.
(E) Zebras have a richer repertoire of vocal signals than do similar species such as horses.


OA Later

Is the correct answer D. As it states the use of stripes for identification.

IMO D is better here

paes wrote:All zebras have stripes, and the most widespread subspecies has the best-defined stripes. The stripes must therefore be of importance to the species. Since among these grassland grazers the stripes can hardly function as camouflage, they must serve as some sort of signal for other zebras.

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 strips is also characterized by exceptional size and vigor.
(B) In certain tall grasses zebras can be harder to spot than grazing animals with a coat of uniform color.
(C) A visual signal transmitted among the members of a species can consist of a temporary change of color perceptible to other members of the species.
(D) Zebras react much faster to moving shapes that have stripes than they do to moving shapes that are otherwise identical but lack stripes.
(E) Zebras have a richer repertoire of vocal signals than do similar species such as horses.


OA Later

I would say C only by POE

I don't know how it can be D..if Zebras react much faster to moving shapes that have stripes than they do to moving shapes that are otherwise identical but lack stripes - that means they react slowly to their predators..how?

OA is D only.

C does not deal with Zebra or anything related to stripes. It is just a stement. You can say it is a shell game.

deepshi291 wrote:I would say C only by POE

I don't know how it can be D..if Zebras react much faster to moving shapes that have stripes than they do to moving shapes that are otherwise identical but lack stripes - that means they react slowly to their predators..how?