Experienced birds do not attack the Himalayan caterpillars because they are
Answer: C
Correct answer: Inedible
The passage says the caterpillar's prominent colour informs would-be predators of its inedibility, and that a bird which does eat one vomits it and afterwards avoids similar species. Experience teaches the bird that the caterpillar cannot be eaten, not that it is dangerous or diseased.
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