In the monetarist version of the AD-AS framework, starting from long-run equilibrium, a decrease in velocity produces

a.no change in Real GDP in the short run or the long run.b.no change in Real GDP in the short run, but a rise in the long run.c.a fall in Real GDP in the short run, but not in the long run.d.a rise in Real GDP in both the short run and the long run.