I would say that his tone makes him sound annoyed..
False. While the author can include his opinion, this shouldn't happen very often, as in a research paper, you are supposed to mainly be stating facts.
Add a your thesis statement. Which is what your whole story is about. So, the introduction could sound something like this.
“Drugs and pre-marital sex are very common in today’s world. They seem to be around just as much as anything else. (insert thesis here; for example if your story was about what makes them so common, you could say...) But what makes these two vastly different actions so common?
B. It is the most likely to be taken as a literal sense. A and C aren’t always true and/or accurate.
