Examine the following psa. cigarets don't know when you were asleep.

This Hardly makes any sense at all, Provide more info

The drug inside cigarettes called nicotine is a highly addictive drug, so when you introduce that drug into your system it becomes a big part of your life. When you're sleeping, and your nerves send signals to get nicotine in your body, they can't know that you're sleeping, all they know is your body need nicotine.

C. Income level.

hope this helps :)

Explanation: