The nurse is preparing to administer a loading dose of digoxin to a patient in atrial fibrillation with a heart rate of 130 beats/minute. Which statement describes the rationale for the loading dose?
A) A loading dose quickly achieves therapeutic levels of digoxin in the bloodstream.
B) A loading dose helps to stabilize the heart rate and rhythm.
C) A loading dose prevents adverse effects associated with digoxin therapy.
D) A loading dose enhances the patient's response to other medications.