The correct answer is B) driving under the influence.
The number one killer of teenagers is driving under the influence.
You need to pay attention to this information. Driving under the influence of alcohol or any illegal substance is indeed the number one killer of teenagers. Please, make it one of your daily "mantras:" do not drink and drive. When you are at your parties, do not drink alcohol and drive a car or any vehicle. This is a major risk and it's against the law. You put at risk your life and other people's life.