When Assessing Breath Sounds During the Secondary Assessment, the EMT

When assessing breath sounds during the secondary assessment, the EMT shows he is employing a correct technique when he listens:

A) at the left second intercostal space followed by the right second intercostal space.
B) first to the apex and base of the right lung and then to the apex and base of the left lung.
C) to the base of the lung by placing the stethoscope at the third intercostal space laterally.
D) over the left and right lateral wall while instructing the patient to breathe shallowly and fast.