Fossil insects many times larger than any insects alive today have been dated to the Carboniferous and Permian periods.These fossils are evidence that during these periods
A) the climate was much warmer than it is today.
B) there were fewer predators on insects than there are today.
C) the carbon dioxide concentration of the atmosphere was lower than it is today.
D) insects had fewer competitors for food than modern insects.
E) the oxygen concentration of the atmosphere was significantly higher than it is today.
Correct Answer:
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