The investment demand curve will shift to the right as the result of: a. the availability of excess production capacity. b. an increase in business taxes. c. businesses becoming more optimistic about future business conditions. d. an increase in the real interest rate.

Letter C is correct!

Explanation:

The letter C is correct because if companies were more optimistic about the rate of return on investment, the investment demand curve would shift to the right, ie it would increase, because to increase the rate of return, the investment curve would also influence in other business processes, such as profitable new product development, optimistic future sales provisions, and reduced taxes.

turnover

the amount of money taken by a business in a particular period.