Question

A(n) ________ is a brief, parenthetical reference that you place at the end of a sentence or paragraph.

Answer 1

I would assume it's A, citation

Step-by-step explanation:

If it's a parenthetical reference, it's not likely a source, nor comment or annotation but rather, a restated quote or re-worded statement, which refers to the correct definition of citation.

I apologize if this is incorrect or unhelpful.