What is the likely effect of a rightward shift in the Marginal Efficiency of Capital?

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Lower overall consumption levelsRaise total demand in the economyCause a decline in aggregate supplyLead to a slowdown in economic expansionNone of the above

Explanation

An outward (rightward) shift in the Marginal Efficiency of Capital typically encourages more investment, which tends to increase aggregate demand rather than reduce aggregate supply. Therefore, it does not cause a decrease in aggregate supply.