en Hanna: Attempt 1 Question 41 (1 point) NSo NS1 Real Interest Rate I'1 1213 Quantity of Investment and Saving (S) Use the diagram above to answer the following questions. Which of the following could explain the change in the position of the national saving curve to NS,? a) a decrease in income tax rates Ob) an increase in income tax rates c) an increase in government spending O d) an increase in consumption