Which statement is true about objective intent to enter a contract?

a$.$ While objective intent is important, subjective intent, or the willingness to be bound, is the deciding factor.

b$.$ Offers made in jest like, "This Subaru is worthless and for $$10$ l$\text{'}$d sell it$.$ It's always in the shop!" can form valid offers if an objective person overhears the offer.

c$.$ Offers that are part of a preliminary negation such as$,$ "Are you interested in selling your boat for $$2000?$ are valid offers and give the offeree the power to create a contract by assenting to the offer.

d$.$ Offers are judged by the objective theory of contracts that measures the objective intent of the offeror by the reasonable person standard. The reasonable person standard asks if a reasonable person viewing the circumstances would conclude that the parties intended to be bound.