They are used but fire extinguishers helps stop a fire amd a fire blanket is used to stop someone on fire so i think it would be true.
A plural noun is a word that indicates that there is more than one person, animal place, thing, or idea. When you talk about more than one of anything, you're using plural nouns. When you write about more than one of anything, you usually use the same word, simply adding an s, es, or ies to the end.
I think B would be the correct answer
