Final answer:
Ken is not liable to Ragal for the sale of the car because he is a minor and contracts made by minors are generally voidable at their discretion.
Step-by-step explanation:
The question pertains to whether Ken is liable on the contract with Ragal Used Car Co. for selling his car despite being a minor and having accepted a better offer from another dealer. In most jurisdictions, a contract entered into by a minor is voidable at the minor's discretion. This means that Ken can choose to disaffirm the contract he made with Ragal, even after accepting the better offer, as he is still under the age of majority (usually 18). Therefore, option 3 is correct: Ken is not liable to Ragal because he is a minor.