To record the bipolar limb leads I, II, and III and the unipolar limb leads aVR, aVL, and aVF, place electrodes on:
A. both of the patients arms and left leg, with a ground on his or her right leg.
B. the patients right arm and left leg, with a ground on his or her left arm.
C. both of the patients legs and his or her left arm, with a ground on his or her right arm.
D. both of the patients arms and his or her right leg, with a ground on his or her left leg.