D maybe this can help you for it
A faction is defined as a group of people with the same interest. According to Madison, the danger that a faction poses to good government is that it acts in its own interest, not the people's interest. What is bad about a faction is that, it will try to get what they want even if it hurts others. Hope this answer helps.
I think it is because you need them to separate
She is supporting an inference from the text. An inference is something that is implied, and the person saying they've "witnessed much fighting" infers that they're old, whereas "I am wounded with iron" can be taken to mean he's been wounded by a weapon like a sword.