Mandy has agreed to prepare an education savings plan for Kevin by the end of the month. Kevin has agreed to pay $$800$ for the completed plan. During the negotiating process, Mandy deliberately made false statements that persuaded Kevin to agree to the contract. The contract may be void or unenforceable by:

a$)$ a mistake in the terms of the contract

b$)$ misrepresentation

c$)$ undue influence

d$)$ duress