Years Ago, When Congress Imposed Very High Tax Rates on High

Years ago, when Congress imposed very high tax rates on high incomes, it provided for more loopholes in the federal tax system. These loopholes:

A) brought the profits earned by government employees under the nontaxable bracket.
B) enabled angel investors to invest directly in businesses.
C) enabled investors in oil and gas wells to increase their taxable income.
D) allowed interest groups to give soft money to political parties.
E) enabled many wealthy individuals to decrease their tax bills significantly.