I would say that it depends on the audience. Personally, a debate regarding ethics and moral dilemma is interesting. Read The Fat Man and the Impending Doom. It's just one paragraph so it's not going to bore audience.
https://thedailydilemma.wordpress.com/2007/06/18/fat-man/
I believe that this type is a lecture-forum discussion.
Yo dijo que es B biblioteca
Answer:
1. The third option
2.
C
A
B
3. The third option: The small crowd of protesters had turned into an angry mob
4. Second option: my friends cheered as I scored the winning goal
5. You have never been as scared as you are now