The Nurse Correctly Understands That He Should Use a Skin

The nurse correctly understands that he should use a skin puncture for diagnostic tests in which of the following circumstances?

A) When the patient is younger than 2 years.
B) When the veins are inaccessible.
C) When a patient's fingers are calloused.
D) When a simpler way to obtain blood is desirable.
E) If the test requires a large volume of blood.