select the answer below that best describes how the lungs are kept free of germs and dirt from the air.
A. The alveoli acts as a filters for the lungs collecting particlles of dirt and germs to be exhaled when the diaphram relaxes
B. Tiny hairs known as cilila clean the trachea of dirt and germs before it can enter the lungs
C. Hairs known as cilia, found inside the alveoli, collects the dort and germs to be expelled from the lungs
D. Mucus found in the bronchial tubes collect dirt and germs that gets into your lungs. Tint hairs called cillia work to sweep out the debris collect to keep your lungs clean.