Suppose that Maude has a contract with Nelson, who is obligated to deliver 700 live frogs to her shop. Maude (assignor) assigns her rights to Obie (assignee). Maude does not notify Nelson (obligor) of the assignment. Nelson delivers the frogs to Maude. In this case, a. Nelson still owes Maude 700 frogs on the contract. b. no debt is owed to any parties. c. Nelson will have no further obligations under the contract, and Maude owes Obie 700 frogs. d. Obie is required by law to sign a novation