Arielle Is an 8-Year-Old with Cystic Fibrosis

Multiple Choice

Arielle is an 8-year-old with cystic fibrosis. For 30 minutes each morning and evening, a parent holds her body in various positions and massages and kneads the areas over her lungs to dislodge the abundant, sticky mucus, which Arielle spits into a jar. She also takes medication - an enzyme - that thins the mucus. If she didn't take these measures, the mucus in her lungs would most likely increase her risk of

A) cancer.
B) emphysema.
C) infection.
D) asthma.