Okay, that was good! Now this time, don't close your eyes. Keep your eye on the ball, soyou know when to close your hands,'' Mark said in the process of teaching his 5-year-old to play catch. In operant conditioning terms, Mark is using _____ to teach his daughter how to catch a ball.

A)the partial reinforcement effect
B)shaping
C)generalization training
D)negative reinforcement