Respuesta :
D, summary of information. A discovery is not accurate, because this is a research paper, meaning you are researching something that has already happened. B isn't correct, because recommendations are generally only used for persuasive writing. C isn't correct, because a deeper question in the ending wouldn't make sense, as you want to cover everything in the body. D is your correct choice, since you always want to summarize information at the end of a research paper.
A summary of information. I took this test already and I'm pretty sure that this is the right answer hope this helps