The central feature in this photo was formed by:
(A) Erosion of a ring dyke
(B) Impact of a meteorite
(C) Volcanic eruption
(D) Uplift of a concave slope
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統計: A(4), B(3), C(0), D(2), E(0) #2135725
統計: A(4), B(3), C(0), D(2), E(0) #2135725