According to the Concept of Instinctual Drift, Which of the Following

According to the concept of instinctual drift, which of the following statements would be true?

A) Training a pigeon to flap its wings in order to escape a shock is harder than training a pigeon to peck a button in order to escape a shock.
B) Training a pigeon to flap its wings in order to escape a shock is equally as hard as training a pigeon to peck a button in order to escape a shock.
C) Training a pigeon to peck a button in order to escape a shock is harder than training a pigeon to peck a button in order to obtain food.
D) Training a pigeon to peck a button in order to obtain food is harder than training a pigeon to peck a button to escape a shock.