Brendon Has Been Using Xanax for a Period of Over

Multiple Choice

Brendon has been using Xanax for a period of over six months.Alex,his friend,asks him to stop using the drug as it adversely affects the body.Brendon listens to Alex and discontinues taking the drug.However,upon withdrawal,he experiences immense physical pain accompanied by increased craving for the drug.This is most likely due to

A) physical dependence.
B) decreased tolerance.
C) transitive inference.
D) mental instability.