Which of the Following Is True of a Contract, the Object

Multiple Choice

Which of the following is true of a contract, the object of which has become unlawful after the creation of the contract?

A) The contract is still legal as the object was legal at the time of creating that contract.
B) The contract is illegal even if the parties don't complete the contractual agreement.
C) The parties of the contract will be discharged from that contract.
D) Both parties are still obligated to complete their contractual agreements.