Explanations

belligerent, corporeal, and epithets

Start with the third blank: You need something that can be yelled, and can’t be stopped with handcuffs, so a word like insults would make sense in the blank. Of the choices, only epithets means insults.

The second blank should contrast with the third blank, and describe the type of violence that can be stopped with handcuffs. Hence, you need a word like physical; of the choices, corporeal is the best fit.

Finally, the first blank should mean something like fighting, since you know the two men are handcuffed and have been engaging in physical violence.
Belligerent is the best choice.

Hence options C, D and G are correct!
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