Ursula's Cat Nearly Trips Her Up Every Time She Uses

Multiple Choice

Ursula's cat nearly trips her up every time she uses her can opener.Yes,she mainly uses the can opener for the cat's favourite food,but she occasionally uses it for other purposes.And each time the cat is in her feet,and Ursula is at risk of falling.She decides to repeatedly use the can opener on various cans without giving the cat any food.What is this procedure called?

A) spontaneous recovery
B) stimulus generalization
C) higher-order conditioning
D) extinction