Answer: c. an implied contract, enforceable against Jay.
Explanation:
An Implied contracts is usually between physician and a patient this contracts do not state the course of action or payment at the start or inception of the service. Example, a medical examination usually takes place the moment a patient's request for it, this tests are usually either at the patients home or at the medical facility where the doctor practices. After the examination a course of action or payment is decided. Same applies to Jay after been treated and discharged from the hospital a course of action or payment may be made.
