A nurse is discontinuing an IV infusion. For which of the following reasons is it important to verify and document the integrity and condition of the IV catheter?

a) A broken-off catheter tip indicates the risk for an embolus.
b) Catheter erosion indicates that it was left in place too long.
c) Blood within the catheter could indicate clot formation.
d) Discoloration of the catheter could be a sign of phlebitis.