A Dual-Chamber Pacemaker Is Surgically Placed in a Patient's Chest

A dual-chamber pacemaker is surgically placed in a patient's chest.Wires then carry pulses to the right atrium and the right ventricle.Why would the pulses be carried to the right chambers of the heart and not the left chambers?

A) The left chambers are reduced or absent in many subadults.
B) The right chambers of the heart are weaker and need more stimulation.
C) Only the right chambers of the heart need to contract to move blood to the lungs.
D) It is easier to run the wires from the pacemaker through the vena cava.
E) Once the right chambers are activated the pulse will be carried to the left chambers.