30.下列何者為趨同演化 (convergent evolution) 的例子？ (A) the exoskeleton of a spider and the exoskeleton of an insect (B) the digging front legs of a mole and the digging front legs of a mole cricket (C) the wings of a monarch butterfly and the wings of a luna moth (D) the tadpole stage of a frog and the tadpole stage of a salamander (E) the stinging hairs of a sea anemone and the stinging hairs of a jellyfish