according to the liquidity preference theory, an increase in the overall price level of 10 percent a. increases the equilibrium interest rate, which in turn decreases the quantity of goods and services demanded. b. decreases the equilibrium interest rate, which in turn increases the quantity of goods and services demanded. c. increases the quantity of money supplied by 10 percent, leaving the interest rate and the quantity of goods and services demanded unchanged. d. decreases the quantity of money demanded by 10 percent, leaving the interest rate and the quantity of goods and services demanded unchanged.