Critical Reasoning (CR) | Some insects are able to feed on the leaves of milkweed, a toxic plant

Some insects are able to feed on the leaves of milkweed, a toxic plant, by first cutting and draining the vein that secretes the toxin. This method of detoxification guarantees that some insects will always be able to eat milkweed, because the plant could never evolve to produce a toxin that is lethal in the trace amounts left after the vein is cut.

The argument depends on which of the following assumptions?


A. The insects that successfully detoxify milkweed are not able to undergo the evolutionary
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