When Commercial Banks Need More Federal Reserve Notes

When commercial banks need more Federal Reserve Notes,

A) they call the Bureau of Engraving and Printing,which delivers the requested amount.
B) they call the Board of Governors of the Fed,which delivers the requested amount.
C) they ask their customers to exchange their Federal Reserve Notes for U.S.Treasury securities.
D) they call the Treasury,which delivers the requested amount.
E) they call their Federal Reserve District Bank,which delivers the requested amount.