You've Been at Your Job for About a Year, and Have

You've been at your job for about a year, and have asked to switch to another department within the company that you think would be a better fit for you. Then one of the managers from that department offers to buy you a coffee so that you can discuss the move. You accept, but it soon becomes clear that the manager wants a sexual favour in exchange for moving you to the new department. What should you do?

A) Refuse the manager's proposition, but don't report the incident in hopes that it will not affect your chances.
B) Agree to the manager's proposition; you really want to move your career forward.
C) Talk directly to the manager about why his proposition is inappropriate and how it makes you feel.
D) Seek out the human resources department and let them handle investigating the complaint.