7. Susan values a pair of blue jeans at $40. If the price is $35, Susan buys the jeans and generates consumer surplus of $5. Suppose a tax is placed on blue jeans that causes the price of blue jeans to rise to $45. Now Susan fails to buy a pair of jeans. This example has demonstrated

a. the administrative burden of a tax.

b. horizontal equity.

c. the ability-to-pay principle.

d. the benefits principle.

e. the deadweight loss from a tax.