Answer: Fraud
Explanation: Contracts are legally binding and thus cannot be rescinded (cancelled) easily. The only way a contract may be rescinded is if evidence exists that undue influence (forcing someone into the contract) or fraud took place. In terms of fraud if a person is induced into a contract by material misrepresentation, then the person who was induced into the contract may rescind the contract.
Beth was induced into the contract by Alan. Because Alan knowingly misrepresented material features about the business to Beth, this is a form of fraud on Alan's part. Beth is thus allowed to rescind the contract.