Elysia Chlorotica,a Sea Slug,is an Animal That Has Chloroplasts in Its

Multiple Choice

Elysia chlorotica,a sea slug,is an animal that has chloroplasts in its tissues as an adult but not when it is very young.What is the most likely explanation for this?

A) Some of the animal's mitochondria change into chloroplasts.
B) The chloroplasts were acquired by an ancestral form of sea slug and then passed down.
C) The animal evolved the ability to make chloroplasts.
D) The animal acquires chloroplasts through its diet of yellow-green algae.
E) The animal makes chloroplasts by being exposed to sunlight.