According to the Keynesian transmission mechanism, an increase in the money supply causes a(n) in the interest rate and a(n) in investment, which in turn causes a(n) in total expenditures and aggregate demand.

lower; rise; raises.

Explanation:

According to the Keynesian transmission mechanism, when there is an increase in money supply which is an expansionary policy, this will result into a reduction in the interest rate.

Since the interest rate has been reduced, this will lead to an increase the in investment as investors will be willing to borrow loan for investment opportunities and this will also lead to a rise in the total demand and expenditure.

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the answer is account d