What is the term for a strong mental and emotional craving for a drug

A)  withdrawal 
B)  tolerance 
C)  psychological dependence 
D)  physical dependence

Psychological Dependence

A form of dependence that involves emotional-motivational withdrawal symptoms, such as anxiety or cravings, upon cessation of drug use or certain behaviors.

Drug

Any substance that, when ingested, injected, inhaled, or absorbed, has a physiological effect on the body, used for medication or in reference to narcotics.

Withdrawal

The process of reducing or eliminating the use of a habit-forming substance or ceasing engagement in a particular behavior.