when to raise from the BB with several limpers (NL Question)

[paulish]

A player in middle position limps, CO & SB limps also. You're in the BB, Witch hands would you raise with in NL, and how much would you raise in the following scenarios;

A) Early levels of the wsop main event (avg stack)
B) Early levels of $215 sunday tourney on Stars (avg stack)
D) After the 2nd Break of the $215 stars tourney (avg stack
C) Short stack (40xBB) in a cash game
D) 200xBB stack in a cash game

Are there any distinction of what hands you play, and how much you raise in the different situations?

Assume [*] No info on players[*] All limpers have you covered