Option A sounds like the most logical, as ‘tumbling’ down a rocky cliff sounds painful and maybe life-threatening, thus dangerous.
The correct answer is A.<span>could not be heard above the voices in the hallway
</span>
B is a subject, C is an adverbial of reason, while D is an adverbial of manner.
Communicators who utilize a powerful style are considered more competent and attractive, while communicators that utilize powerless communication are seen as victims.
The correct answer is c not either other answer
I would, but there's a high possibility what I write will be used. I wish you luck on the theme though :>