Kevin buys a new Volkswagen and signs a contract with Volkswagen saying that he will never sue the company for any personal injuries he may receive as a result of a faulty car. In exchange, Volkswagen reduces the price of the automobile by $6,500. This type of contract provision is:______.a. a revisionary clause.b. a dormant commerce clause.c. an exculpatory clause.d. a valid liquidated damages clause.