If a car's is malfunctioning, people in the car will become ill when driving long distances, especially if the windows are closed. a. braking system b. air conditioning c. exhaust system d. cooling system

When a person undergoes root canal treatment or another endodontic treatment: [select all that apply] a.) the inside of the tooth is carefully cleaned and disinfected. b.) air is forced into the canal to stop bleeding. c.) the inflamed/infected pulp is removed. d.) the inside of the tooth is filled and sealed with a rubber-like material called gutta-percha