Angela Brock borrowed $$544,000$ and signed a note payable to Amerifund Mortgage Services, LLC$,$ to buy a house in Silver Spring, Maryland. The note was indorsed in blank and transferred several times "without recourse" before Brock fell behind on the payments. On behalf of Deutsche Bank National Trust Co$.,$ BAC Home Loands Servicing LP initiated foreclosure. Brock filed an action in a Maryland state court to block it$,$ arguing that BAC could not foreclose because Deutsche Bank, not BAC, owned the note. Determine whether BAC can enforce the note, and explain your reasoning. To support your brief explain the difference between authorized and unauthorized indorsements.