Which Statement Best Describes the Hypothesis for Why High Atmospheric

Which statement best describes the hypothesis for why high atmospheric CO₂ limited evolution of large megaphylls?

A) The CO₂ caused global warming, shading the plants and limiting plant growth capacity.
B) High CO₂ caused too much damage to plants with large leaves, because of suffocation.
C) Large leaves captured too much light compared with the amount of CO₂ they could take up, so they stayed small to avoid light.
D) With high CO₂, more stomata were needed, so the plants with large leaves lost too much water.
E) With high CO₂, fewer stomata were needed, so the plants had less capacity for evaporative cooling of large leaves.

Correct Answer:

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