(1) If you get nosebleeds, you have several options. (2) You know that you should see a doctor if your nosebleed was caused by an injury, such as a punch. (3) What do you do if it just starts bleeding on its own. (4) Here are some steps to stopping a nose bleed. (5) The first is, don't lie down. (6) Sit up or stand. (7) Next, use tissues or a damp washcloth to catch the blood. (8) Then, tip your head forward (don't lean your head back; this can make blood run down your throat). (9) Also, pinch the soft part of your nose together (just below the bony part of your nose) and breathe through your mouth. (10) Do this for 10 minutes. (11) Make sure you hold the pressure for 10 minutes without stopping.

What is the best way to correct sentence 3?
A. What do you do if it just starts bleeding on its own?
B. What do you does if it just starts to bleeding on its own?
C. Make no change.
D. What does you do if it just starts bleeding on it's own.