Answer:
c. One option is to challenge the adequacy of the EIS for the line.
Step-by-step explanation:
Tongue River Railroad is an organization which proposed to construct rail line in the Southeastern Montana which would connect the areas of Montana and Ashland. It received the approval from the Interstate Commerce Commission.
But the approval of the project was argued by the Northern Plains Resource Council (NPRC) that it might harm the wildlife, aquatic life and the sensitive plants near the line. Thus NPRC can challenge the EIS's adequacy for the construction of the line.
An EIS is an information system that is used in decision making process. Thus NPRC can challenge the correctness of the EIS given the approval without considering the ill effects to its surrounding bu the construction of the rail line.