What was the main purpose of the interstate commerce act of 1887?
a) to ensure the spread of manufacturing across the frontier
b) to remove import taxes for goods shipped from one state to another
c) to protect american agriculture and industry from foreign competition
d) to prevent railroads from charging farmers and merchants high shipping rates

The correct answer is D) to prevent railroads from charging farmers and merchants high shipping rates.

The main purpose of the Interstate Commerce Act of 1887 was to prevent railroads from charging farmers and merchants high shipping rates.

The act. effective on April 7, 1887, was aimed to regulate the railroad industry and avoid monopolistic practices. The act also tried to protect farmers of America stating that the rates should be fair. That was needed because farmers were not rich people that could afford high transportation prices to move their goods.