DAILY NEWS 1887 February 4, 1887
Congress Passes
Groundbreaking
Interstate Commerce Act
Opponents of the law mentioned in the headline included:
O A. Populists, who fought against powerful business interests.
O B. rural residents, who relied on railroads to travel to cities.
O C. farmers, who depended on the railroads to ship their crops to
market
O D. the railroad industry, whose ability to set its own prices was now
limited

D. the railroad industry, whose ability to set its own prices was now  limited

Explanation:

The Interstate Commerce Act was passed after years of complaints against the Railroad industry which practiced price discrimination and other monopolistic practices that enabled them to make massive profits.

The Act limited their ability to set their own prices and required that their prices be just. This meant that they could no longer charge exorbitant prices. The Railroad industry was therefore opposed to this and lobbied against its passing.

c it says nothing about connecting those 2 seas.