They are all right and all wrong depending how you look at it. They are all right due to their limited indvidual perspective, but overall they are all wrong because it doesn't present the entire picture. Think of it as a puzzle that you don't know what it is going to look like. Each person has an indvidual piece, and based on their pieces, they are guessing what the puzzle will make. Only if they come together will they have a clear picture of the puzzle. I hope this helps.
Your first sentence should be a hook. Your second sentence should be your thesis statement and the rest should be what the body paragraphs should be about.
