Forward guidance is

A$.$ the current system under which the Fed uses the interest rate on banks' reserve balances and the interest rate on overnight loans with financial firms to establish a floor under the federal funds rate.

B$.$ the statements by the Federal Open Market Committee about how it will conduct monetary policy in the future

C$.$ the Fed policy that attempts to increase aggregate demand by buying long$-$term securities$,$ such as $10-$year Treasury notes.

D$.$ a financial transaction in which the Fed borrows funds overnight from a financial firm.