Option B. absconded
absconded - leave hurriedly and secretly, typically to avoid detection of or arrest for an unlawful action such as a theft.
Example: The cashier abscond the money secretly because her mother is seriously ill.
The Three men's lives were saved as they were held above water by the monster which they discover to be a modern submarine, named the Nautilus, as they climb inside they come upon the submarines captain and his crew, his name is Captain Nemo (as i recall).
Logos is an appeal to logic and is a way of persuading by reason. Concession is useful because sometimes to win you need all the assets in the room, and one of the best resources comes straight from the others mouth. It allows room for your opponents ideas and audiences beliefs. You're bridging truths to get to your point.