Answer:
A
Explanation:
Here is a tip for these types of questions you encounter. Try to put yourself into the situation. For C, if aren't provided with any factual evidence. In addition, it is an opinionated answer choice, meaning that it can be taken out instantly. It can't be B either since the question is asking you about a "discourse" (something that is debatable), and that "citation" can be discussed on how factual it actually is. So B can be taken out of the picture. And lastly, it can't be D as well since it isn't supported with evidence as well. It only expands on how cigarettes aren't "fashionable" and "fun." Ok, so lets put yourself inside this answer choice, let's be the person debating it. You could argue that so they aren't "fashionable" and "fun"? Well, I'll just smoke it anyways, nothing bad could happen (Which is not true obviously, don't actually smoke). See, we just argued about that statement. Which means that D is incorrect.
Hope that this helps! I tried to make it understandable and entertaining at the same time!