A. Schulzke's main claim is that actions in a virtual world are very different from actions in the real world, though a player may “kill” another player in a virtual world, that player is instantly back in the game and the two will almost certainly remain friends in the real world thus virtual violence is very different from real violence, a distinction gamers are comfortable with...
B. They are back.
C. They will be back.
I am confused with the bold parts. I mean what are the functions of the words"back" there? what kind of part of speech? And, what do really mean those three bold parts?
Meanwhile, what about b, and c?