Plzzz help me I am timed plz

Why does the following in-text citation only use a page number at the end?
In Hawthorne's “Rappaccini's Daughter," the reader is introduced to a world of ambiguity that is simultaneously
beautiful and tragic: "It was not love, although her rich beauty was a madness to him... but a wild offspring of
both love an horror that... burned like one and shivered like the other" (399).

A. Only a page number is used because the author is not mentioned in the text.

B. Only a page number is used because the author is mentioned in the text.

C. Only a page number is used because the page number is the only requirement when doing in-
text citations

D. Only a page number is used because in-text citations should be kept as short and concise as
possible.