need help thanks

Dan and Rob are neighbours. Each has a different skill set. Dan, an electrician, agrees to wire Rob's basement in exchange for Rob (a carpenter) building a deck in Dan's backyard. After Rob builds the deck, Dan discovers that he will be unable to wire Rob's basement without completely replacing Rob's antiquated electrical panel at a cost of $50,000. Which of the following statements is TRUE? Select one: Q a. If Rob agrees to give up his right to Dan's performance in exchange for Dan wiring Rob's cabin, the parties will have solved their problem through accord and satisfaction. cross Ut O b. The original contract is unenforceable because it is not supported by legal tender. cross 0'\" O 0. Since Rob has performed his obligations under the contract, he cannot forego his contractual rights even if placed under seal. cross out 0 d. The parties can rescind the agreement. cross out 0 e. In these circumstances, Dan will be able to argue the contract has been frustrated. cross OUt