ashwink wrote:
Source: Ready4GMAT
Fossilized remains of a horn thought to be of a triceratops found in sedimentary rock in 2011has been dated to be 65.5 million years old and thus is evidence that dinosaurs existed shortly before the asteroid impact that is believed to have made them extinct.
A) has been dated to be 65.5 million years old and thus is
B) has been dated at 65.5 million years old and thus
C) have been dated to be 65.5 million years old and thus are
D) have been dated as being 65.5 million years
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