LSAT Critical reasoning-76

Could anyone please solve this question with an explanation?

Answer B
Argument made is “industrial-by-products are in the swamps”
Reason:
Abnormalities seen in alligators that happen in reptiles only due to elevated hormones.
Industrial waste products lead to elavated hormones
But they don’t clarify if industrial by products are the only reason for ths increased activity

Thank you, but what’s the problem with D?

That is a debilitating criticism, because what if the abnormality is only limited to alligators, and not other reptiles, but it is not a very good one for two reasons:

  1. It says alligators developed “telltale” abnormalities, those that are characteristic of elevated hormones in reptiles. This reduces the need for checking other reptiles.
  2. You have a better option - B