Write the next sentence in the following story.

How to survive a wildfire
Remain calm.
The situation is extremely dangerous, but panicking will only hinder your ability to adapt to the situation and survive.
Breathing techniques are an excellent way to keep calm, if the air is not too smoky already.

Available choices: A. If heat is roaring, then you will need to do things fast to stay more composed. If you are alone in the chamber, you may need to prepare some blankets and cover to minimize the heat. B. The reason fires are less dangerous is because water is more concentrated in the air. Taking deep, measured breaths is especially crucial when you are dealing with the wildfire threat. C. Breathe in, cover your mouth with your hands, and breathe in deeply through your nose. Clear the air using your stomach, jaw, and the back of your throat if needed. D. Take a deep breath in for four seconds, then exhale slowly for four seconds. Repeat until you feel more calm and in control, but again, if the air is already smokey you should not take deep breaths.. The answer should be
D.