D. For over two hundred years, the reason for New England's Dark Day was unknown. Finally, researchers from the University of Missouri discovered that wildfire smoke from Canada rose up to the atmosphere, traveled hundreds of miles, and blotted out the sunlight over New England.
This is the central idea, as all other sentences are supporting sentences.
The answer is most likely C. If not I am sorry.
B. If you paraphrase from a medical journal, you need to cite your source, and C is obviously theft.
Answer: Dr. Pickhardt states that there are three different kinds of teenage crushes: identity crushes, romantic crushes, and celebrity crushes. What they all have in common is that they are a projection of the adolescent's ideal image, "making it more fantasy than reality" and is a reflection of the person having the crush. Dr. Pickhardt describes identity crush by stating that a person will like someone that they look up too or wants to emulate. Pickhardt describes romantic crush as a person who is really attracted to the other person or is excited to be around and wants to spend all their time with that person.