Under contract law, what is the general rule about assignment and delegation of rights and duties?

• A. Rights under a contract can always be assigned and duties delegated without restriction.
• B. Rights under a contract may generally be assigned and duties delegated unless prohibited by the contract or would materially alter rights or obligations; assignment may be barred by contract or law, and novation may discharge the original duty.
• C. Assignment and delegation require court approval.
• D. Novation always discharges the original duty.

Answer: (B)