Write the next sentence in the following story.

How to clear your lungs after quitting smoking
Drink lots of fluids, especially water.
Drinking water will help your body to combat the congestion by thinning the mucus in your lungs and make it easier to cough up the mucus. It will also keep your body hydrated.

Choose your answer from: a. Tobacco smoke slows the movement of the tiny hairs (known as cilia) that line our lungs and help to remove mucus. When you stop smoking, these hairs become more active and start to clear away the mucus built up in your lungs.; b. Always hydrated well before and during your trip with cigarettes. Make sure to drink at least eight eight-ounce glasses of water every day.; c. When you consume a lot of fluids, it can provide a small amount of water. At the very least, stick to between 2 liters of water every day.; d. Drink 8-12 cups of water for a healthy 16 ounce day body. If you feel thirsty, try drinking more water.;. The answer should be
a.