How Would a Time in the Earth's Supercontinent Cycle When

Multiple Choice

How would a time in the Earth's supercontinent cycle when there was much formation of oil shale deposits,coals,and limestones affect the carbon dioxide (CO₂) concentration in the Earth's atmosphere?

A) There would be an increase in the total CO₂ in the atmosphere.
B) There would be a decrease in the total CO₂ in the atmosphere.
C) The formation of limestones decreases total CO₂,while the formation of oil shale and coal increases total CO₂.
D) The formation of oil shale deposits,coals,and limestones has very little effect on carbon dioxide