I'm kind of confused if your asking anybody to answer this for them selves personally or what but for me it's all of the above.
Answer:
Tribalism is the state of being organized by, or advocating for, tribes or tribal lifestyles.
Explanation:
With a negative connotation and in a political context, tribalism can also mean discriminatory behavior or attitudes towards out-groups, based on in-group loyalty.
I would narrow it down between A and C, but i think the answer is C.
"And thanks to my first story, I’d already met most of the school administrators in person and had the beginnings of an actual list of sources for future stories."