The correct answer is C. Downstairs.
Downtown is a word that refers to the central business district of a city. It is usually located in the lower part of the city, near the waterfront.
Downpore is not a word. It is a misspelling of the word "downpour." A downpour is a heavy rain shower.
Downright is an adverb that means "completely" or "utterly." For example, you might say that someone is downright rude or that something is downright delicious.
I hope this helps!
