Underwater skills are necessary for a diver.
It is required for a diver to understand the skills of breathing underwater.
If a person does not know how to handle his breathe under water, he may likely be out of breath and this will create pressure on his lungs.
When a person is in second stage the water is exhaled from the mouth then he should inhale gradually and press the purge button to clear out any remaining water.
The correct answer is B. Inhale partially, then press the purge button.
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