The correct answer is A. rainforests are responsible for most global oxygen turnover.
This is not true because rainforests, even though they have a lot of trees, are very humid, and actually take up a lot of oxygen to be able to 'feed' the vegetation found there. Other forests actually provide most oxygen in the world, but not rainforests. The other options are correct.
They both still traded goods form one country to the next. In both roads, culture and religion spread too.
<span>The answer is C, ardipithecus ramidus</span>
