The Concept of Instinctual Drift Refers To

The concept of instinctual drift refers to:

A) the fact that an organism learns behaviours by observing mature organisms.
B) an unlearned response triggered by a simple stimulus.
C) the tendency for a conditioned response to regress towards instinctual behaviour.
D) the ways in which instinctual behaviours can be modified to create unique conditioned responses.