Doubt in RC

I’m confused between choice A and choice B. Can anyone help me solve it?

The passage doesn’t mention weather whatsoever . I will rather focus on the choices which mentions something related to equipment .

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The unforeseeable weather conditions could have resulted in mountain-climbing injuries even without the improvements in mountain-climbing equipment, i.e. this option doesn’t reconcile the discrepancy. Hence, option B is wrong and the correct answer is option A.

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Got it. Thanks a lot guys.