Bark Producer enters into a contract where Bark agrees to buy all of the green beans that Dastardly Farms grows in the 2014 growing season. Unfortunately, the region where Dastardly is located experiences a record drought, resulting in lower than normal green bean production for Dastardly. Which, if any, of the following are true concerning the contract between the parties? a) Bark is obligated to purchase the green beans from Dastardly. b) Drought, begin unforeseeable, is a basis for the parties to terminate the agreement without further obligation. c) Dastardly can terminate the agreement at any time for its convenience. d) Bark can terminate the agreement at any time for its convenience.