#1 would be the answer because the sentence would not be able to stand alone.
The answer to this is your hair. I just looked it up and thats what most sites are saying
Energy drinks are really dangerous for teenagers especially kids because Some energy drinks contain extremely high levels of B3 (niacin) and B6, which in excess are known to cause issues like skin conditions, gastrointestinal problems, liver toxicity, blurred vision and nerve damage. Monster energy drink in particular contains 200% of the Daily Value, or recommended daily limit, of niacin. There is a lot of coffeine in energy drinks aswell.