The Hoffmans Were Having Their Home Remodeled by All-Right Contractors

The Hoffmans were having their home remodeled by All-Right Contractors. The roof had to be removed in order to build the second story the Hoffmans had contracted and designed to build. After All-Right had removed the roof, but before a covering was placed over the exposed half of the home, All-Right's foreman said the job would cost an additional $12,500. The Hoffmans refused to agree to the additional fees and All-Right's foreman said, "Suit yourselves. Looks like rain for the next day or two," and left. The Hoffmans called All-Right and agreed to pay the $12,500 extra and went in to sign the paperwork. Which of the following statements is true?

A) The contract for the additional $12,500 is valid and binding.
B) The contract for the additional $12,500 is invalid because of duress.
C) The contract was not valid because of duress, but the Hoffmans signed anyway - so there is a valid and enforceable agreement.
D) None of the above