Question

Will give medal!
Which answer properly corrects the phrase fragment in italics?

To answer your question. I must first fill you in on the background.









A.
Answering your question; I must first fill you in on the background.







B.
To answer your question, I must first fill you in on the background.







C.
I must first fill you in on the background, and to answer your question.







D.
I must first fill you in on the background. To answer your question.