GMAT Sentence Correction (SC) | Re: Glaciers form when the snow, sleet, and hail that fall in a

Glaciers form whenthe snow, sleet, and hail that fall in a given climatic region exceed the amount capable of being lost through evaporation or meting.

A. the snow, sleet, and hail that fall in a given climatic region exceed theamount capable of being
Terribly awkward : "the amount is capable of being lost" as if the amount has a capability of its own to do something (in this case, "being lost")
B. a given climatic region's fallen snow, sleet, and hail exceeds the amount
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