Answer:
The name Hopi is a shortened form of their autonym, Hopituh Shi-nu-mu ("The Peaceful People" or "Peaceful Little Ones").
Definition of Hopi: A member of a Pueblo people living chiefly in northeastern Arizona.
The answer is B because it can be easily shortened down/ make more sense without the commas to: I heard in the weather report that it's going to rain.
It is appropriate for a research paper because it is not opinion based or based in fantasy, it is a real thing you can do research on.
Yeah sure whatever you need
I think that you would have to add commas in each of the sentences, is they how they are written? Did you take the punctuation out?