Answer:
A. The offer terminated with Reston's death.
Explanation:
According to the contract law, both parties have to agree with each other in terms of opinion and contract. The contractual agreement should be either mutually written or orally bound to become legal. In that case, James only offered to sell the mountain cabin to Jennifer. Since Jennifer did not respond whether to purchase it from James or not, it could not be a contract. Therefore, the option A is correct.