During a Home Visit, the Patient with Diabetes Mellitus Tells

During a home visit, the patient with diabetes mellitus tells the nurse that she is having a very difficult time obtaining blood for glucose monitoring.Which intervention does the nurse use to help the patient obtain a good blood sample?

A) Asks the health care provider to order a different monitoring device.
B) Instructs the patient to position the lancet on the side of finger or forearm.
C) Teaches the patient to find a good site and use it repeatedly.
D) Tells the patient to run warm water over the hand before testing.