Where things are i would check a text book i i were you
I think it's C but I'm not to sure because I didn't read the whole thing :/
The answer would be began because if a barricade fell down in the middle of a confrontation and there is something that has to do with a riot it would only make sense that a riot would happen which the answer would be began.
The sentence should read; Hector says he does not know when the movie starts. The correct answer is know.
