The interstate commerce act of 1887 resulted from the efforts of the granger movement in order to improve

The granger movement wanted modernize farming and reduce the equipment and transportation costs, which would result in the regulation of the transportation system which arbitrarily charged high fares.

Explanation:

The granger movement was established by midwestern and southern farmers who wanted to increase profits from agriculture. However there were established railroad monopolies that arbitrarily increased transportation crops. Farmers managed to establish cooperatives where they could store crops and farming equipment. However the transportation costs were still high, and farmers had an increasing amount of debt. Consequently, the granger movement proposed a set of laws, called the granger laws, in order to regulate these monopolies. However, the federal government proposed another law, which was deemed constitutional, regulating the prices that the railroad companies charges, and ending with the arbitrariness of the pre - 1887 system.

Answer: economic conditions of farmers by regulating railroad rates