The correct answer is: B. A contract which ceases to be enforceable by law.
A void contract is a contract that is not legally binding. This means that the contract is not enforceable in court. There are a number of reasons why a contract might be void, including:
- The contract is illegal.
- One or both parties to the contract do not have the legal capacity to enter into a contract.
- The contract is not supported by consideration.
- The contract is not in writing, when it is required to be in writing by law.
A unilateral contract is a contract in which one party makes an offer and the other party accepts the offer. The offeror is not obligated to perform under the contract unless and until the offeree accepts the offer.
An implied contract is a contract that is not created by an express agreement between the parties, but rather by the conduct of the parties. Implied contracts are often created by the actions of the parties, such as when one party starts to perform work for another party without any prior agreement.
An express contract is a contract that is created by an explicit agreement between the parties. Express contracts are often written down, but they can also be oral.
I hope this helps!