C is the correct answer. It is impossible to argue logically that the insects’ method of
detoxification by cutting and draining guarantees that some insects will always be able to eat
milkweed without assuming that for some reason that toxin-carrying veins of the milkweed can
never evolve to become so strong that they would thwart the insects’ attempts to cut through
them.
A is incorrect. The passage does not make any claims about plants other than mildewed. The
insects that detoxify mildewed
...
detoxification by cutting and draining guarantees that some insects will always be able to eat
milkweed without assuming that for some reason that toxin-carrying veins of the milkweed can
never evolve to become so strong that they would thwart the insects’ attempts to cut through
them.
A is incorrect. The passage does not make any claims about plants other than mildewed. The
insects that detoxify mildewed
...
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