Assume, the Fed wants to increase the money supply by $10 billion. Currently, the reserve ratio is 10%. What should the Fed do?

a. purchase $1 billion worth of Treasury securities from the market

b. sell $1 billion worth of Treasury securities from the market

c. purchase $10 billion worth of Treasury securities from the market

d. sell $10 billion worth of Treasury securities from the market

e. sell $11 billion worth of Treasury securities from the market