In Pioneering Research with the Sea Slug Aplysia,Kandel and Colleagues

In pioneering research with the sea slug Aplysia,Kandel and colleagues demonstrated that,after generating a strong gill-withdrawal response by delivering a shock to the tail of Aplysia,even light touches to the tail would provoke gill withdrawal for some period of time.This finding demonstrates the behavioral principle of:

A) classical conditioning.
B) habituation.
C) operant conditioning.
D) sensitization.