What is the answer and why?

John's car is hit by Ben's truck. A doctor tells John that he will be disabled only temporarily. Ben's insurance company offers John $5,000 to settle his claim. John accepts and signs a release. Later, John learns that he is permanently disabled. John sues Ben and the insurance company. John will a. win, because John did not know when he signed the release that the disability was permanent. b. win, because Ben caused the accident. c. lose, because John signed a written release-no fraud was involved, and consideration was given. d. none of the above