Tulsa, Inc. had a contract to supply Cowdung Co. with its requirements for cattle feed for the year The price was fined at $.05 above the price per bushel that Tulsa pod for the food Due to an exceptionally cold winter, Tulsa found that its capacity to perform this contract was doubtful Thus, Tulsa offered to assign and delegate the contract to Feed Co Feed Co. Agreed. Which of the following statements is true? a) Tulsa is liable if Feed Co. breaches the contract. b) Tulsa has not effectively assigned its rights and delegated its duties. c) Tulsa has been relieved of its obligations under the contract. d) Tulsa's duties are not delegable to Feed Co, because Feed Co.'s performance would be substantially similar to Tulsa's