Aaron Has Been Taking a Mild Amphetamine for the Past

Multiple Choice

Aaron has been taking a mild amphetamine for the past four months to help him cope with being a full-time student while holding down a full-time job.Now that his classes have ended he wants to stop taking the amphetamine,but each time he tries to skip the medication he starts sweating and he develops tremors.It appears that Aaron has

A) developed a drug tolerance for amphetamines.
B) become amphetamine intolerant.
C) developed a physical dependence for amphetamines.
D) habituated to the effects of amphetamines.