Which Is Likely Not an Example of Coevolution

Which is likely not an example of coevolution?

A) A moth that has a long tongue reaches the nectar of a flower that is housed in a long tube.
B) A tree trunk growing thicker and stronger prevents breakage from hurricane force winds.
C) A caterpillar develops resistance to a toxin produced by its main plant food source.
D) A mollusk develops a thick shell to avoid predation by a crab with strong pinchers.
E) All answers could be examples of coevolution.