if the fed purchases u.s. government securities, gross domestic product a. decreases because the resulting increase in the interest rate leads to an increase in investment. b. increases because the resulting decrease in the interest rate leads to an increase in investment. c. increases because the resulting increase in the interest rate leads to a decrease in investment. d. decreases because the resulting increase in the interest rate leads to a decrease in investment. e. decreases because the resulting decrease in the interest rate leads to an increase in investment.
