Which Example Illustrates Shaping

Multiple Choice

Which example illustrates shaping?

A) Children in a family receive gifts or treats regardless of whether they behave well or poorly.
B) A rat receives foot shocks that are presented randomly but are always signaled by a bell.
C) Twenty minutes into the flight, a business traveler no longer notices the soft hissing of the plane's overhead air vent.
D) In preparation for a recital, a piano teacher praises a student for first learning musical scales, then simple songs, and then complex songs.