Edward Thorndike Studied Animal Behavior and Learning Processes

Edward Thorndike studied animal behavior and learning processes. He formulated a theory of learning based on his research. The law of effect is one component of that theory. What does this law state?

A) Conditioned responses cannot be unlearned.
B) Learning is lost through not performing learned behaviors.
C) Responses may be altered by a resulting state of affairs in the environment.
D) Environment largely controls responses.