The News Reports That a Nurse "Contracted Over the Telephone

The news reports that a nurse "contracted over the telephone" to distribute narcotics. Would that action taken by a nurse considered to be a contract?

A) Yes, the contract agreement can be verbal or written.
B) No, contracts must fulfill a lawful purpose.
C) Yes, if something of value, like money, is offered as compensation.
D) Yes, if both parties understand the agreement.