What Is an Example of Observational Learning

Multiple Choice

What is an example of observational learning?  

A) A baby garter snake captures and eats a slug.
B) A chick's gaping mouth induces a feeding response in a parent bird.
C) A European cuckoo hatchling pushes the host bird's egg out of the nest.
D) A male fruit fly waves his wings at a female fruit fly during courtship.
E) A marmoset monkey mimicking another marmoset in successfully opening a container