Evidence for the impact that occurred near Chicxulub,Mexico,includes all but which of the following?
A) Quartz grains with shocked crystal structures,indicating a short and violent impact
B) Iridium anomaly at roughly 100 sites worldwide in a thin layer of rock 65 million years old
C) Sand-sized spherules of minerals suggesting a melting and resolidification of rock
D) Large pieces of meteorite found in Mexico
E) The K/Pg boundary clays have a different composition from clays in the limestone layers above and below it;they might be explained by a mixture of one part asteroid to ten parts Earth crust
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