What evidence would a planetary geologist use to identify a "young" crater on Mercury?
A) Infrared and photographic results showing evidence of water released recently from the permafrost by the impact
B) Sharper rim and central peak compared to older craters,whose features would have suffered significant erosion by wind and dust
C) Lighter-colored central region,because older craters would have acquired a layer of dark dust over time
D) Few,if any,smaller craters within it or on its rim
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