Summer Is Teaching Herself to Type Using a Computer Software

Multiple Choice

Summer is teaching herself to type using a computer software package. The first time she used the program, the sentences she was supposed to type scrolled very slowly across the computer screen and when she finished the computer played a clapping sound. However, now she has to type the material faster than her previous "best time" before the computer plays the clapping sound. This computer software package incorporates

A) classical conditioning.
B) modeling.
C) shaping.
D) negative reinforcement.