The answer is a Mrs Johnson got the books,pencils and paper from the supply room.
The correct answer choice should be C. The adverbial phrase is In complete silence. It describes HOW the test should be taken
The answer should be B) because social media is a long distance communication tool for people, so not C) since that's false, that's where most danger is at is online, not D) because that wasn't the original purpose, but sadly its become popular now and not A) because that's incorrect.