What guarantees that the statements supplied by an insurance applicant are true?

The correct choice is a warranty because, in the context of insurance, a warranty is a specific type of statement or promise made by the applicant regarding the truthfulness and accuracy of certain information provided in the application. Warranties differ from representations in that they must be true in every respect. If a warranty is found to be false, it can provide grounds for the insurer to deny a claim or void the policy altogether, regardless of whether the false statement was intentional or not.

In contrast, a contractual agreement establishes the overall terms and conditions of the insurance policy but does not specifically guarantee the truthfulness of the statements made by the applicant. A disclosure document typically serves to inform the applicant about the terms and conditions of a policy but does not certify their accuracy. Lastly, an endorsement is an amendment or addition to a policy that modifies its coverage or terms but does not pertain to the truth of information provided in the application process.