1. Coronavirus
2. Virus
3. All around the world.
4. 2019-2021 (current)
5. It impacted the world in an unexpected way. No one expected a virus to come out.
The answer is (D). "You have never been as scared as you are now."
A run-on sentence is a sentence having two independent clauses with improper punctuation and without conjunctions. The correct answer is option b. It is difficult to understand a run-on sentence because you cannot identify where to pause or stop and that the sentence does not have conjunctions which would help in the transition of clauses.
Hello 10028095,
Im pretty sure he uses conversational tone to make the reader more comfortable with the character and to make the character more realistic and relate-able.
I hope I was of some help today! :)