In contract law, which of the following correctly relates to the terms valid, void, and voidable?

a. Once a party has been declared legally insane by a court with proper jurisdiction, all contracts entered into by that person would be voidable at the other party's option

b. Void contract are otherwise valid, but one of the parties has the power to set the contract aside

c. Voidable contracts are agreements that are void from the start

d. Once a party has been declared legally insane by a court with proper jurisdiction, all contracts entered into by that person would be void