A B is absolutely correct, this is an autopen (meaning it was an approved autograph by MJ himself, which is applied mechanically by a machine and not handwritten by him). Here is another that is identical.
Actually, what's going on here is someone did a good job forging the autopen variation of MJ's sig. This is not even an autopen... it's a forgery of an autopen. haha. Which IMO is hilarious.