When the Brelands Tried to Teach Raccoons to Drop a Coin

When the Brelands tried to teach raccoons to drop a coin in a box by using food reinforcement for doing so, the raccoons:

A) quickly learned this task via shaping through approximations.
B) spent an inordinate amount of time rubbing the coin between their front paws instead of dropping it into the box.
C) tended to bury the coin in the ground and then dig it up instead of dropping it into the box.
D) failed to learn an association between the coin and food.