Germs?

While brushing my teeth, I got a little overexcited and flipped the toothbrush out of my mouth.  It hit the edge of the counter, the toilet seat, then somehow fell behind the toilet into a puddle (I think from the shower).  What should I have done?

A. Finish brushing, then throw it away just to be on the safe side.
B. Stop brushing immediately even though I was barely halfway done.
C. Rinse it off and it’s fine.  Five second rule.

Weigh in.