You Train Your Pet Dog to "Sit" and "Roll Over

Multiple Choice

You train your pet dog to "sit" and "roll over" on command by rewarding it with a dog biscuit whenever it performs the desired behavior. This is an example of

A) Pavlovian conditioning.
B) imprinting.
C) a releaser triggering a fixed action pattern.
D) a conditioned reflex.
E) operant conditioning.