During the Paleocene-Eocene Thermal Maximum (PETM) 55.8 million years ago a significant amount of carbon was released into the ocean and atmosphere in a relatively short amount of time (less than 10,000 years). Based on the evidence from fossilized plant leaves in Bighorn Basin in Wyoming, which of the following happened in that region during the PETM? Select all that apply. A Rainfall decreased

B Air temperature increased

C Air temperatures decreased

D Plants with smooth-edged leaves which are better adapted to warmer climates became more abundant

E Rainfall increased causing the forest in the region to convert to a sub-tropical rain forest