Tina, an experienced pool contractor, and Bruce agree on a price for Tina to build a pool in Bruce's backyard. Tina discovers that she did not initially figure in enough of a charge for labor. She tells Bruce that unless she receives an extra $5,000 with which to hire workers, she cannot complete the job. Bruce agrees thinking to himself that he has a way out. When Tina finishes the pool, Bruce refuses to pay the additional $5,000. Which of the following is the most likely result of their dispute? A) Bruce will be required to pay because unforeseen circumstances are an exception to the preexisting duty rule. B) Bruce will only be required to pay % of the agreed upon amounts because of the calculations involved under the preexisting duty rule. C) Bruce will be required to pay because a typical, unilateral contract is involved, and he got the benefit of his bargain. D) Bruce will be required to pay because a typical, bilateral contract is involved, and he got the benefit of his bargain. E) Bruce will not be required to pay because he provided no additional consideration, and the preexisting duty rule applies