If the Monetary Authorities Decide to Increase the Nominal Money

If the monetary authorities decide to increase the nominal money supply by 10% when the economy is at its full-employment level of output, in the long run the aggregate price level increases by _____% and real GDP _____.

A) 10; increases by 10%
B) 5; increases by 5%, according to Okun's law
C) 10; returns to the potential level of output
D) 5; increases by 20%, given a marginal propensity to consume of 0.5