A Patient Asks the Nurse, "How Does HIV Cause AIDS

A patient asks the nurse, "How does HIV cause AIDS?" The nurse's response should be

A) "HIV attacks the immune system, a system that protects the body from foreign invaders, making it unable to protect the body from organisms that cause diseases."
B) "HIV breaks down the circulatory system, making the body unable to assimilate oxygen and nutrients."
C) "HIV attacks the respiratory system, making the lungs more susceptible to organisms that cause pneumonia."
D) "HIV attacks the digestive system, decreasing the absorption of essential nutrients and causing weight loss and fatigue."