What possible disadvantage of interest groups does this scenario illustrate: An interest group representing auto manufactuers runs ads opposing a high speed train project, even though the the train would reduce commute times for many citizens

They focus primarily on the interests of their members, not on the public good.

Explanation:

Given that the high-speed train project would reduce commute times for many citizens thereby benefiting the public generally.

An interest group representing auto manufacturers running advertisements opposing such a project shows that the disadvantage of the interest groups is that "They focus primarily on the interests of their members, not on the public good."

try this

explanation:

the graph shows the spread of railways in the 1800s.

based on the graph, the conclusion that can be drawn about germany is answer d)   by 1880, germany had more rail lines than great britain and russia.