【单选题】

The nurse plans to administer an injection of heparin to a client. Which of the following techniques for heparin administration is appropriate
A．Selects a 1.5-inch, 21-gauge needle for the injection.

B．Makes the injection into the deltoid muscle.
C．Applies gentle pressure to the site for 5 to 10 seconds after the injection.
D．Aspirates with the plunger to check for entry into the blood vessel before injecting the heparin.