I completely disagree with B. What I usually see people (including myself) are annoyed about is stuff like images of posts of people saying (mostly US-) political stuff that most people on lemmy agree with (e.g. "trump is stupid").
For A, you could just think about whether your post might be more suitable in another community. Does it merely include politics indirectly, or is some political message the whole point of your post.
It's about people posting things that are just politics in this community, despite rule 2. It's not about being "unpoltical" / "impartial" (which is a political position). At least that's how I've understood it.
I swear I did not mean to reference any piece of media that includes a bed with tentacles. In fact, I don't even think I have seen such a thing yet. My friend neither, and he wouldn't mind gaining new knowledge.
Professor Who