Supervening Events That May Lead to Frustration of a Contract

Supervening events that may lead to frustration of a contract are not likely to include:

A) unexpected destruction of the subject matter of the contract.
B) a party to the contract dying where the contract requires the party to perform a personal service.
C) an unexpected change in the law making performance of the contract illegal.
D) a change in the conditions under which one of the parties is obliged to perform their obligations, even if that change is only slight.