Answer:
Both answers that you have selected are right !
Explanation:
for the top one, you would refer to the participants as a "their", since its to other people, and a group.
the bottom one is "produce really loud, piercing sounds" since it's simply grammatically correct and makes sense when spoken aloud !!
i hope this helps !! :D have a good day
I believe it’s c. Submissive means to be passive ( allowing )