A. Pausing before speaking to make the point stronger
Explanation:
Basically, rhetorical devices are a set of techniques used to convey one's message more effectively.
This is used both in texts and speeches. However, speaking allows some other additional techniques unavailable in written texts.
Speakers are able to change their intonation, to speak louder to emphasize certain points. They can also use their hand and face gestures to stress the importance of parts of the speech. Of course, for the same reason, they can make dramatic pauses before or after sentences.
