All of the above!
As i could only select one i went for "because she's a thief" as that's what i consider to be the worst one.
It just goes to show where BB's morals are at when they'd rather have someone who's been seen clearly stealing on the show than someone who's 'crime' was disobedience to Big Brother.
I don't really dislike Sophie but there's far stronger reasons that she shouldn't win than there are for her to win.