Whenever you give a fact it looks better and more smart to show where you got the fact so it can be in the first paragraph last paragraph etc anywhere you give facts you should cite your sources so the information is more trusted and looks better . Hope this helps ! (:
The answer is B declarative. If you need I can explain.
Answer:
You haven't cited the piece of literature for which you require this information. Please advise, and please ask your questions separately.
Explanation: