As the first major tariff revision since the Civil War, the ___ was signed into law by Wilson in order to lower tax rates and even place some items on the tax-free list.

Underwood-Simmons Bill, is the right answer.

Explanation:

Underwood-Simmons Bill is another name for the Revenue Act of 1913. With the enactment of this act, President Woodrow Wilson reintroduced a federal income tax and lowered the tariffs extremely. The Democratic party, as well as President Wilson, had observed high tariffs as unfair taxes on the consumers thus he made this act to reduce the burden of taxes on Americans.

Underwood simmons bill

Explanation:

Just took the test

it should be d or b but i'm sure it's d