When Comparing the Keynesian and Monetarist Approaches, the Only Substantive

When comparing the Keynesian and monetarist approaches, the only substantive difference is that

A) the Keynesian equation leads to a prediction of real GDP; the monetarist equation leads to a prediction of nominal GDP.
B) Keynesians concentrate on aggregate demand and monetarists concentrate on aggregate supply.
C) Keynesians approach aggregate demand by multiplying the money supply by velocity, while monetarists use the equilibrium conditions of the expenditure schedule.
D) Keynesian analysis suggests that money affects consumption first while monetarist analysis suggests that money affects investment spending first.