Anastasia Wants to Run and Finish a Marathon

Multiple Choice

Anastasia wants to run and finish a marathon.Every day her trainer measures the distance she is able to run and even though far short of the 26-mile distance of a marathon,Anastasia is praised for her daily runs.Her trainer feels that if he starts with the basic running skill and rewards her smaller efforts,that Anastasia will eventually run a successful marathon.Her trainer is addressing her running behaviour by using the principles of ___________.

A) approximation
B) delay of gratification
C) extinction
D) shaping