Every time Maricella goes to work in the morning, she notices that her dog sulks in the corner of the room and looks very sad. Over several weeks, she notices that the dog gets unhappy when she picks up her car keys, immediately before leaving the house. Which phenomenon of learning best describes the dog's behavior?

A) classical conditioning
B) innate learning
C) punishment by removal
D) instinctive drift

Classical Conditioning

A method of instruction that involves the repeated combination of two stimuli, resulting in a behavior that, while initially induced by the second stimulus, is eventually induced by the first stimulus alone.

Punishment

A consequence applied to an individual or animal in response to an undesirable behavior, with the intent of decreasing or eliminating that behavior.

Instinctive Drift

Tendency for an animal’s behavior to revert to genetically controlled patterns.