Which Scenario Best Illustrates Operant Conditioning

Multiple Choice

Which scenario best illustrates operant conditioning?

A) A man gets sick when he smells the same kind of food that caused him food poisoning.
B) A man asks for a raise because, in the past, his requests have been successful.
C) A woman has been frightened by thunderstorms all her life and her fears are getting worse.
D) A child watches a friend steal from a store, so he thinks he might steal in the future.