A Patient Asks Why Asthma Medication Is Needed Even Though

A patient asks why asthma medication is needed even though the patient's last attack was several months ago.Which response by the nurse is appropriate?

A) "The medication needs to be taken or your lungs will be severely damaged and we will not be able to prevent an acute attack."
B) "The medication needs to be taken indefinitely according to your doctor,so you should discuss this with him."
C) "The medication is still needed to decrease inflammation in your airways and help prevent an attack."
D) "The medication needs to be taken for at least a year;then,if you have not had an acute attack,you can stop it."