Lower prices
a. increase the marginal utility per dollar spent and cause consumers to buy less of a good.
b. lower the marginal utility per dollar spent and cause consumers to buy more of a good.
c. lower the marginal utility per dollar spent and cause consumers to buy less of a good.
d. do not change the marginal utility per dollar.
e. increase the marginal utility per dollar spent and cause consumers to buy more of a good.