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【单选题】
A novice scuba (潜水初学者) diver practicing in a swimming pool takes enough air from his tank to fully expand his lungs before abandoning the tank at depth L and swimming to the surface. He ignores instructions and fails to exhale () during his ascent (上升) . When he reaches the surface, the difference between the external pressure on him and the air pressure in his lungs is 9.3kPa. From what depth L does he start? Is the diver safe when he reaches the surface?A.
L = 0.95m, safe
B.
L = 1.95m, not safe
C.
L = 0.95m, not safe
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