If I may, I would like to describe my reasoning for the answer I have chosen with a brief metaphor.
So, there's this scenario where there are two people at a crowded shopping mall, and both approach a small ice cream shop at about the same time. Person #1 stops walking forward for a moment and says to person #2, "go ahead" while motioning one hand toward the line inside the shop. Person #2 says "Thanks
".
What is the more likely meaning of "go ahead" ?
A. I'm in no rush, you may enter the line for ice cream before me, I don't mind.
B. HOLY CRAP ARE YOU JOHN PETRUCCI, THE KEYBOARDIST OF THE BEACH BOYS???