Q25 - Many bird and reptitle

[atzhang6v6]

Does C assume increase the apparent body size=threaten predators?
Is it because it is kind of common sense so it was not mentioned?

Thank you

[ManhattanPrepLSAT1]

Hey atzhang6v6, you got!

You have to use common sense on the LSAT. The assertion that you should bring no outside knowledge to the LSAT is just wrong.

We're trying to explain why a trait like hissing would have emerged in an environment when hissing couldn't have been heard by the predators of the common ancestor of birds and reptiles. It should serve some sort of defense function and answer choice (C) describes that function as increased size.

Incorrect Answers
(A) is out scope. What matters is whether the predators of the common ancestor could hear the hissing, not whether the common ancestor could.
(B) is too weak. It doesn't help explain how hissing (without sound) could help defend the common ancestor.
(D) is out of scope. How does this make hissing effective as a defense mechanism? And remember, predators cannot hear the hissing.
(E) is too weak. So long as the common ancestor has some predators, we're curious about the development of the hissing trait.