Citations means to work cite someone else's work to not plagiarize - copying someone else's work without referring
You are right, the prepositional phrase in the sentence <em>Late last night there was a loud knock at the door </em>is D) at the door.
The only preposition in the sentence is <em>at, </em>therefore this has to be correct.
Answer:
The Illustrated London News is a book available in Google books which relates.
Explanation:
My best guess would be A. knowing how to dissect a test and it’s questions
A) the importance of size and interesting eating habits of blue whales.
