Are anti-assignment clauses generally enforceable, and what is the effect of an assignment on the obligor's duties?

• A. Yes, enforceable; the assignment automatically relieves the obligor of duties.
• B. No, anti-assignment clauses are rarely enforceable; assignment has no effect on duties.
• C. Yes, typically enforceable; an assignment does not automatically relieve the assignor from obligations.
• D. No, assignments automatically discharge all duties from the obligor.

Answer: (C)