Adam offered to buy automobile batteries from Ben. Adam's purchase order was complete with respect to all material terms except price, which was omitted. If Ben accepts Adam's offer, and the price of automobile batteries is well established in the industry, which of the following statements is true?
a. A contract cannot be formed between Adam and Ben if the price is not included.
b. A contract can be formed between Adam and Ben only if it can be proved that the parties intended to enter a contract to discuss the price.
c. A contract can be formed between Adam and Ben, but the price will be treated as a proposed addition to the contract which must be accepted by both parties.
d. A contract can be formed between Adam and Ben even though the price term was omitted.