A single-interest group is a group that is trying to push forward legislation and momentum around, well, a single-issue.
This might mean gun-control or reproductive rights.
They might have candidates in one party that they prefer but they are broadly trying to convince ALL candidates to believe what they believe.
So, B is the correct answer.
Via propaganda. They created movies which showed pro war themes... So people were encouraged to go out to fight or be anti German etc by following their examples.
Iron ore. It is used to create steel, and of the top three iron ore companies in the world two are in Australia.
Can recognize themselves in a mirror.