The most important antitrust law in American history was the Antitrust Act of 1890.

The Sherman Act of 1890

Explanation:

The Sherman Antitrust Act was enacted in 1890 to curtail combinations of power that interfere with trade and reduce economic competition. It outlaws both formal cartels and attempts to monopolize any part of commerce in the United States.

the correct answer is: (1) affected by gerrymandering; (2) not affected by gerrymandering.

gerrymandering is known as a practice that intends to establish a some kind of political advantage for a particular party or group. to do this district boundaries are manipulated. the new resulting district is named a gerrymandering.

in other words, what gerrymandering does is to draw the boundaries of electoral districts trying to benefit the party who is doing it. sometimes, the party controlling the legislature will redraw it so they can maximize the number of districts they are likely to control.