Watching/looking out for the early syntoms.
I believe "reasonable" would be the word you are looking for there.
Answer
The answer is D. Frequency, Intensity, and duration
Explanation:
I read a CDC article on the term.
<span>While you sleep, your brain processes sounds on a basic level, sometimes causing you to wake or jostle. The impact of sound depends on the stage of sleep you are in.</span>
