Answer:
a. Mekayla kicks her cat.
Step-by-step explanation:
The frustration aggression theory simply states that aggression is a result of frustration.
Obviously, Mekayla would be frustrated after bombing her piano recital and would show aggressive behavior. Eating a sandwich, meditating and taking a nap are NOT signs of aggressive behavior. Therefore, the correct option is a. Mekayla kicks her cat, which is a sign of aggression.