The word would be 'use' because it can be used both as a verb and noun but here is used as the noun. We can tell they want a noun since the word 'correct' is an adjective, which describes only nouns. It wouldn't be 'used' because it is a past tense of the verb.
Answer:
B
.The historical documents about the invention of fireworks have been lost.
The coordinating conjunction in the above sentence is "nor". A coordinating conjunction is a word that connects phrases, clauses and words. There are only 7 coordinating conjunctions. They are best remembered by using the acronym FANBOYS:
F = for
A = and
N = nor
B = but
O = or
Y = yet
S = soThe important thing to remember is that a coordinating conjunction gives equal emphasis to both clauses, phrases and words in a sentence. It is also important to remember to add the correct punctuation between the clauses and the coordinating conjuction
