【单选题】
A In the STE example, this safety description is given as a caution, but if you know about oxygen systems, youalso know that oxygen can occur explosions
B ln the non-STE example, this safety instruction is given as a caution, but if you know about oxygen systemsyou also know that oxygen can cause explosions
C In the non-STE example, caution is given in this safety description. But if you know about nitrogen systemsyou also know that nitrogen can cause flames,
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