Question

PLEASE HURRY IT'S URGENT!!!!!

How is the underlined gerund phrase used in the sentence?
(Note: "reading the whole novel" is underlined.)
After *reading the whole novel*, Amy still couldn't remember the main character's name.
A. object of a preposition B. subject C. direct object D. appositive

Answer 1

I believe it may be D, but I'm not to sure, let me know if I get this correct.