With Some Difficulty, a Raccoon Was Trained to Place a Single

Multiple Choice

With some difficulty, a raccoon was trained to place a single coin in a piggy bank, but when the trainer attempted to train the raccoon to place two coins in the bank, the raccoon rubbed the coins together for minutes on end, and would not drop the coins.This is an example of

A) instinctive drift.
B) stereotypy.
C) sensitization.
D) differential variability.