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In an economy with 4,000 unemployed people and 8,000 employed people, the unemployment rate is Select one: a. 33.3 percent b. 40.0 percent O c. 50.0 percent Q d. 60.0 percent O e. 25.0 percent An open market purchase of bonds by the Central Bank Select one: a. drains reserves from the banking system and decreases the money supply b. injects reserves into the banking system and increases money demand O c. injects reserves into the banking system and decreases the money supply d. injects reserves into the banking system and increases the money supply O e. drains reserves from the banking system and increases the money supply