If There Is No Agreement Between a Principal and an Agent

If there is no agreement between a principal and an agent regarding the amount for which the principal will compensate the agent,which of the following statements is true?

A) The agent will be allowed to set the price which will be enforced unless it is unconscionable.
B) The court will appoint a magistrate to set the price.
C) The principal will be allowed to set the price which will be enforced unless it is unconscionable.
D) Compensation will be calculated according to the customary fee in the situation.
E) It will be assumed that the agent agreed to work for free on a gratuitous basis.