Patricia and Charlie Entered into a Written Agreement

Patricia and Charlie entered into a written agreement.Patricia promised to pay $5000 to Haden, who is Charlie's brother.Charlie placed his seal on the document, but Patricia did not do so.Three days later, Charlie promised that he would design a new computer program for Bethany, Patricia's sister, in exchange for Patricia's promise.Which of the following statements is the most accurate?

A) Patricia's promise is not enforceable because each party to a contract must provide a benefit to the other party of that contract.
B) Patricia's promise is enforceable because Charlie placed his seal on his agreement with her.
C) Charlie's promise is enforceable because it was given in exchange for Patricia's promise to pay $5000.
D) Patricia's promise is not enforceable because it was not given in exchange for consideration.
E) Patricia must pay $5000 to Haden if Charlie actually does design a new computer program for Bethany.