The Nurse Needs to Take the Blood Pressure of a Preschool

The nurse needs to take the blood pressure of a preschool boy for the first time.What action would be best in gaining his cooperation?

A) Tell him that this procedure will help him get well faster.
B) Take his blood pressure when a parent is there to comfort him.
C) Explain to him how the blood flows through the arm and why the blood pressure is important.
D) Permit him to handle the equipment and see the cuff inflate and deflate before putting the cuff in place.