Answer:
Letter C is correct: Includes the main message of the essay.
Explanation:
Going through each option:
- Letter D, as obvious as it may be, refers indeed to the conclusion.
- Letter B is incorret. As stated by the answer, you should always aim to focus on the main idea of your essay, while writing the introduction. It's nice to start with a catchy aproach, with some creative sentences, but the main effort should be on not diverging from the main idea! For a standard essay of 30 lines / 500 words or so, try to aim for no more than 5 to 6 lines on you introduction.
- Letter A: It may very well include supporting facts and details. It can actually be quite helpful to include them!
