Elmer borrows money from Big Bank, who then assigns the promissory note and mortgage to Financial Institution for valuable consideration. Elmer isn't given notice of the assignment and continues to pay Big Bank. Financial Institution files suit, claiming Elmer is in default because Elmer failed to pay monthly payments to Financial Institution. Which of the following statements is true?
A. Financial Insitution must pay Big Bank for the payments Elmer made.
B. Big Bank must forgive Elmer's loan because they failed to notify him.
D. Financial Institution must pay Big Bank for the payments Elmer made.