Final answer:
The Supreme Court case Wickard v. Filburn held that a farmer's production of wheat for personal use could impact interstate commerce, expanding the scope of federal regulatory power.
Step-by-step explanation:
The case that held that a farmer's production of wheat for his own use could affect interstate commerce is Wickard v. Filburn. The Supreme Court decision in this case demonstrated the broad reach of federal regulatory power under the Commerce Clause of the Constitution. This landmark decision significantly expanded the scope of federal power over individual economic activities, even if seemingly unrelated to interstate commerce. Although not one of the options provided in the multiple-choice question, Wickard v. Filburn is the correct answer to the student's query.