I need the passage to answer sorry I can't comment on your question either so sorry
Answer:
Volunteers
Explanation:
It’s an voluntary activity so people would be there to volunteer.
Karen was disdaining her thoughts on the political debate.
(Now that I have answered your question can you help me with my current one. Its the most recent one on my profile page thing.)
I would go with D, but tell me if I'm wrong or not
good luck xx