According to the supply and demand model for saving, in a closed economy, an increase in the marginal product of capital wil; Select one: O a. Produce an equal increase in the user cost of capital. O b. Decrease the aggregate level of saving. c. Decrease the real interest rate and increase the level of investment. d. Increase the real interest rate and increase the level of investment. e. Increase the real interest rate and decrease the level of investment.

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