Which of the Following Is(are) Fixed Action Pattern(s)

Multiple Choice

Which of the following is(are) fixed action pattern(s) ?

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) All of these are fixed action patterns.