Answer: affect aggregate demand directly.
Explanation:
Monetarists believe that money supply is very important in determining the economic growth of an economy and this is why they advocate for monetary authorities to get involved in the monetary system in order to guide the growth of the economy.
To monetarists, the supply of money influences consumption as well as investment and so directly affects aggregate demand because both consumption and investment are components of aggregate demand. For instance, an increase in money supply increases both consumption and investment and so increases aggregate demand.
