Answer:
The answer is letter C.
Explanation:
The agreement is unenforceable, because it violates the statute of frauds.
An unenforceable contract or transaction is one that is valid but one the court will not enforce. A contract can be said unenforceable if it goes against the statues of fraud or the statement of Goods Act.
And it is illusory because only jane is bound by the agreement. When only a single party is bound by the agreement, the contract is considered illusory, thus unenforceable.