Robert has been declared mentally incompetent by a court and Isabelle has been appointed as his guardian. Two weeks later, without telling Isabel, knowledge, Robert signs a contract to sell his home to Javier for its real market value. The contract is a. enforceable if Robert was the owner of the home in the official town records. b. void. c. enforceable if Robert comprehended the consequences. d. enforceable if Robert knew the market value of the home.