Dr. Rotula is giving young Patel a physical exam. She uses a rubber hammer to strike the tendon just below Patel's kneecap, and Patel's leg kicks out with some force. The doctor does this again and the leg kicks again, only less intensely. Patel gets excited by this and asks the doctor to do this again and again, but after the 5th hit, the leg just barely kicks when Dr. Rotula hits the tendon with the hammer. The reduction of the leg kick (in response to the hammer strike on the tendon just below the knee) is an example of:

A) Extinction
B) Habituation
C) Spontaneous recovery
D) Sensitization