An Appropriate Technique for the Nurse to Implement When Obtaining

An appropriate technique for the nurse to implement when obtaining an arterial blood gas (ABG) specimen is to

A) insert the needle at a 45-degree angle.
B) use a 19-gauge,2.5-cm (1-inch) needle.
C) leave 0.5 mL of heparin in the syringe.
D) aspirate blood after the puncture.