The answer is A because the rest would incomplete sentences
The word C. territory has the same root of the word terrain, as they both refer to a type of ground in one way or another.
A mess that returns if a room is not cleaned often.
<span>If you have been sick with diarrhea, the answer that the health department would accept is this: The diarrhea has been gone for almost two days, so now you can go back to working with food. Once you will be healed, then you can go back to you normal diet.</span>
It is a run-on sentence, because there needs to be a comma after 'his food'. If there were, it would be a normal sentence, but since there isn't, it is a run-on sentence, meaning it lacks the appropriate punctuation mark.