C- that answer does not support sea floor spreading
The answer is deep sea trenches
Nitrogen (78%), Oxygen (21%), Argon (0.9%), and the remaining 0.1% consists of traces of neon, krypton xenon, carbon dioxide, nitrogen oxides, and traces of others. so Nitrogen is the greatest. I hope this helps :)
I personally believe that the right answer is C. Other overpopulation results in more living organisms, and since the pollution has intoxicated the living, they die releasing the carbon into the soil. So there is high amounts of carbon and less of the organic compounds because the overdose on carbon.
Population growth has affected earth a lot based on the pollution we give out. We have also given chances for technology to advance because of population growth and the more and more people who try are the more people who advance with technology. Technically is helpful and allows many things to be simpler than they used to be back 50 years ago hope this kinda helped!