Bill, at the age of 19, is adjudicated to be mentally incompetent by a court and is assigned a guardian. If Bill then enters into a contract with Tom, this contract would be: O A. voidable, if Bill lacked the ability to understand the nature and obligations of the contract B. enforceable, as long as Bill was lucid at the time of making the contract C.vold, because only Tom would have the ability to enter Bill into a binding contract D. enforceable because Bill is over the age of 18 and therefore has legal capacity