Restrictive Monetary Policy Since the Mortgage Debt Crisis

Restrictive monetary policy since the mortgage debt crisis

A) has been aggressively implemented to stop inflationary pressure fueled by quantitative easing.
B) has raised interest rates back to pre-financial crisis levels.
C) has been limited to an attempt to "normalize" monetary policy by paying interest on excess reserves and using reverse repos.
D) has been limited by the zero lower bound problem.