At a market equilibrium, the marginal net benefit curve is

Suppose a wave of optimism causes firms to increase investment. To stabilize output and employment, the Federal Reserve will _____

Fill in the blank(s) with correct word

When the Fed acts as a "lender of last resort," like it did in the financial crisis of 2007-2008, it is performing its role of

A. providing for check clearing and collection. B. being the bankers' bank. C. controlling the money supply. D. setting the reserve requirements.