e) Other
I take it to the proper authorities and end the bully's career cause HIB laws. Seriously, schools take this bullying shit deadly serious.
That's laughable. I don't know what grade we're talking here, but I know that in high school if someone's being physically bullied the school will suspend both the bully and the victim. Doesn't matter if the victim never rose a finger in self defense, if the school sees a fight the system doesn't do a damn thing to investigate. Just suspends them both without question.
Now, while I'm at it, for the topic at hand. Again, it helps to know what grade we are talking here. So I'll try to generalize this.
If you're the parent in this scenario, I can tell you that the last thing you want to be is "that parent" that tries to take action for their kid. You know, "that parent" who makes a big deal out of everything, always going to school board and demanding this and that every time little Johnny comes home with a black eye. Maybe even relocates little Johnny to a different school. Contrary to what most parent's believe, that only gives the bullies satisfaction. Doesn't matter if the bully gets in 'trouble' by their own parents, or even the school. The little shits just know that they hold that much power over your kid. Because that's all bullying comes down to: a power play.
Now, if you're the kid in this scenario, again bullying comes down to a power play. As such the simple thing to do as the victim is to not give the bully any power over you (though how this is done differs with what grade/age we're talking about). Though one similar tactic across all ages would be to surround yourself with friends. As the saying goes, "there is power in numbers". Often a bully will surround himself with a group of little shit heads for this same reason, so why shouldn't you?
Different ages of children will call for different appropriate reactions to bullies as I stated, so it really depends on how old the kid in question is.