In an Experiment, a Bunch of Bananas Was Placed Just

In an experiment, a bunch of bananas was placed just beyond a chimpanzee's reach. Boxes and sticks were left in its housing area. After trying various ways of getting the bananas, the chimps seemed to give up, and then return in a while with an idea that worked. They were demonstrating _____

A) latent learning.
B) insight.
C) conditioning.
D) reinforcement.