Paul Has a Contract to Sell I-Watches to a Jo

Multiple Choice

Paul has a contract to sell i-watches to a Jo Ann in Vietnam,and enter into a contract to purchase the i-watches from Gregory in Silicon Valley.The Vietnam Government banned i-watches imported into the country.Consequently,Paul cancels the contract with Gregory.Is "frustration of purpose" recognized in the United States?

A) Breach of contract
B) Recognized in the United States
C) Generally not recognized in the United States
D) Anticipatory repudiation