What happened at the end of the most recent ice age? A. Land bridges became exposed.

B. Sea levels rose over 300 feet.

C. A mass extinction occurred.

D. The Cenozoic era began.

Why are carbon dioxide concentrations expected to increase? a carbon dioxide concentrations are expected to increase, because fossil fuel burning is expected to increase b. carbon dioxide concentrations are expected to increase, because of an increase in agriculture. c.carbon dioxide concentrations are expected to increase, because more land will have to be cleared for increasing populations and agricultural use. d. all of the above select the best answer from the choices provided mark this and return save and exit next submit submit