When the Federal Reserve Purchases a U

When the Federal Reserve purchases a U.S.Treasury bond for $1 million by writing a check, when the check returns, the Fed's balance sheet will show:

A) An increase in assets and a decrease in liabilities of $1 million
B) Only an increase in assets of $1 million
C) Only an increase in liabilities of $1million
D) An increase in assets and liabilities of $1 million