While Attempting to Draw Blood from an Indwelling Arterial Catheter,the

While attempting to draw blood from an indwelling arterial catheter,the respiratory therapist notices a dampened waveform and has difficulty withdrawing blood for sampling.What should the respiratory therapist's immediate action be?

A) Flush the catheter.
B) Remove the catheter.
C) Reposition the catheter.
D) Recalibrate the transducer.