C is the correct answer I believe
Actually there are some exceptions in some cases though: a/an
example: "not only is there 3 species, but there is a 4th specimen."
The way an author writes (includes punctuation/capitalization, stanza and line length, figurative language, and sound devices)idiom<span>an expression that has a meaning different from the meaning of its individual words (type of fig. lang)</span>
I think the answer is noun.
A is the best answer because when you relate yourself to the text,its easier to understand
