In which of the following cases, the contract is not discharged on the ground of subsequent impossibility?

The correct answer is: B. Change of law

A change of law does not discharge a contract unless the change makes performance of the contract illegal or radically different from what the parties originally agreed to.

In the other options, the contract is discharged on the ground of subsequent impossibility:

• Death of promisor: If the promisor dies before
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