I'm not exactly sure what subject this is, but hopefully my answer can help you just a little bit :)
Any driver must stay alert for any incoming cars or pay attention to traffic lights. In a city, there's a lot of bustling so signal everytime you want to cut in front of someone and pay attention if anyone else signals.
Answer:
the answer is C. 0.20
Explanation:
BAC stands for blood alcohol content, and at a level of 0.20 blackouts and even death are possible