Which of the Following Represent Proper Chest Auscultation Technique

Which of the following represent proper chest auscultation technique?
I.The practitioner should begin auscultation at the lung bases.
II.The bell or diaphragm should be placed directly on the chest wall.
III.The patient should be instructed to breathe through an open mouth.
IV.The patient should be placed in a comfortable upright position.
V.The patient should be told to breathe more deeply than normal.

A) II, III, IV, and V
B) I, II, III, and V
C) III, IV, and V
D) I, II, III, IV, and V