Thompson raised 80 acres of corn, most of which he used to feed his own cattle. He locally sold what ...

Thompson raised 80 acres of corn, most of which he used to feed his own cattle. He locally sold what he did not use. Based on the Supreme Court's ruling in Wickard v. Filburn,
 A)Congress has no authority over Thompson's activity based on the negative aspect of the Commerce Clause.
 B)Congress may regulate Thompson's farming activity because it has a substantial economic effect on interstate commerce.
 C)only Thompson's local government can regulate his farming activity.
 D)only Thompson's state and local governments can regulate his farming activity.