Which measure concerns oxygen usage?

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Multiple Choice

Which measure concerns oxygen usage?

Explanation:
The main idea here is about control over how oxygen is used during an ascent. Banning bottled oxygen directly limits the primary method people use to obtain supplemental oxygen, which reduces overall oxygen usage and helps manage risk. The other options either increase usage (more tanks), impose a partial restriction (only at night), or are unsafe and impractical (avoiding oxygen entirely). So banning bottled oxygen most directly targets and controls how oxygen is used.

The main idea here is about control over how oxygen is used during an ascent. Banning bottled oxygen directly limits the primary method people use to obtain supplemental oxygen, which reduces overall oxygen usage and helps manage risk. The other options either increase usage (more tanks), impose a partial restriction (only at night), or are unsafe and impractical (avoiding oxygen entirely). So banning bottled oxygen most directly targets and controls how oxygen is used.

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