The Following Questions Refer to the Description Below

The following questions refer to the description below.
You are taking an art class and your instructor asks you to draw several animals, including a shark, a dolphin, and a penguin. As you draw these animals you notice that they all have a fusiform shape; in other words, they are tapered at both ends. Despite their similar shape, you are well aware that the shark is a fish, the dolphin is a mammal, and the penguin is a bird.
-What is the best explanation for the similarities and differences in these three species?

A) There is some homology and some analogy in all living organisms.
B) The animals all share a very distant common ancestor.
C) You are seeing an example of convergent evolution: the evolution of similar traits in distantly related organisms due to adaptations to similar environments.
D) You are seeing an example of homology: the evolution of similar function in distantly related organisms due to adaptations to similar environments.
E) You are seeing an example of analogy: the evolution of modified traits in related organisms.