Answer: Her folks car should have more liability insurance.
Explanation:
The folks are upper middle class people who have more income and more number of assets accumulated and invested. If they commit an accident they will be more liable as they have more assets. If the damage is higher then higher amount of liability insurance would cover it.
Joyce is young and a high school senior who does not have much assets and investments. She does not have income also which is less liability. So lesser amount of insurance is sufficient for Joyce car. Insurance covers bodily injury and property damage.