What Should Be the Next Action by the Nurse,once the Over-The-Needle

What should be the next action by the nurse,once the over-the-needle catheter (ONC) has been inserted through the skin and into the vein?

A) Loosen the stylet for removal
B) Check for blood return in the flashback chamber
C) Stabilize the catheter and release the tourniquet
D) Advance the catheter until the hub rests at the insertion site