Citrus Orchard Contracts to Deliver a Crop of Oranges to Dairy

Multiple Choice

Citrus Orchard contracts to deliver a crop of oranges to Dairy Mart. An unexpected freeze destroys the oranges in the orchard. Dairy insists that Citrus deliver by acquiring the oranges on the open market. Citrus claims that this is prohibitively expensive. The best argument against enforcing the contract is

A) frustration of purpose.
B) objective impossibility of performance.
C) anticipatory repudiation.
D) commercial impracticability.