A man on a cell phone cuts in front of you at the deli counter during your half hour lunch break

You know that it takes awhile for them to make each sandwich and you can hear the man asking the person on the other end of the phone what they would like to order. What would be the most appropriate response to practice assertive skills?
A. Don't say anything and just deal with the fact that you are going to be late getting back to work.
B. Step on his foot and then take your place back in line.
C. Say, "I was here first, and the end of the line is back there."
D. Say, "I was here first, but I guess you can cut in front of me."

C