An Appropriate Way for the Nurse to Measure a Patient

An appropriate way for the nurse to measure a patient for crutches is to

A) have a flexion of 45 degrees at both of the patient's elbows.
B) have a space of two to three fingers between the top of the crutch and the axilla.
C) place the crutch tips 1 foot to each side of the patient's feet,and observe the positioning of the crutches.
D) place the crutch tips 1 foot (30 cm) to the front of the patient's feet,and observe the positioning of the crutches.