Its true. The exact definition is "any substance or agent that tends to produce a <span>cancer." courtesy of dictionary.com</span>
I would say B, as both A and D are obviously incorrect and stress can be a natural part of life as long as it does not dominate you.
I would print a story about it because it can show what doing drugs does to you. I would put the side effects so that teens would know why it is not safe to do drugs. I would also put the possibilities of overdoses.
Pain or discomfort in the stomach associated with difficulty in digesting food is called indigestion.
I would say the answer is either A or B. Hope this helps!