A.to explain possible effects of using certain electronic devices before trying to sleep
Explanation:
"Screen Time Can Mess With the Body’s" Clock "" is an article that shows the harmful effects of electronic devices on people's sleep quality. This is because the light from electronic devices can disrupt the biological clock that determines people's sleep schedules. Thus, with the modified biological schedule, people's sleep loses quality, which can impact many elements of individuals' lives.
In summary, the article shows that in order to have a high quality night's sleep it is necessary that all electronic devices are turned off. In that case, we can agree that the article was written to explain the possible effects of using certain electronic devices before trying to sleep.
A steep cliff has to be very high, therefore, there is a long way down. You can also eliminate the other answers. Hope this helps. Ask any additional questions if you want :)