Final answer:
The contract for the car purchase by Rosa, a minor, is likely voidable at her discretion. She can disaffirm the contract and would likely be entitled to a refund, with possible deductions for her use of the vehicle. Therefore, the correct option is D.
Step-by-step explanation:
In the case of Rosa, a minor, who decided to disaffirm her purchase of a car and requested a full refund from Sheehan Buick, the likely outcome would hi_nge on the contract law pertaining to minors. Generally, a contract entered into by a minor is voidable at the discretion of the minor. This means that the minor, in this case Rosa, has the option to either affirm or disaffirm the contract.
Considering she chose to disaffirm the contract while she is still a minor, and given that automobile purchase is not a necessity that would otherwise make the contract enforceable, the court is likely to deem the contract voidable and rule in favor of Rosa. Sheehan Buick would typically be required to refund the purchase price, although they may be entitled to a deduction for the use and depreciation of the vehicle while it was in Rosa's possession.
Therefore, the correct answer to Rosa's situation is likely 'd' - the contract is voidable at the option of Rosa because she is a minor.