Sam goes out shopping, and using his wife Juanita's credit card, he buys $221-worth of groceries. Under agency law, Juanita will probably be deemed:
a. liable for the purchase, based on the doctrine of respondeat superior.
b. liable for the purchase, based on the creation of an agency by operation of law.
c. not liable for the purchase, based on Sam's duty of performance.
d. not liable for the purchase, based on Sam's lack of a power of attorney.