What is economic impracticability, and how may it discharge performance?

• A. It occurs when performance becomes legally prohibited; it may suspend obligations.
• B. It occurs when a party wants to renegotiate terms; it terminates automatically.
• C. It occurs when performance becomes commercially impracticable due to unforeseen circumstances; it may discharge or modify obligations.
• D. It never affects contractual obligations.

Answer: (C)