The answer is actually none of the above. The Devonian Period allowed for amphibians to evolve, as well as terrestrial vertebrate. Forests grew to cover most of the continent. All of these events happened in the Devonian Period.
B is the answer, unsaturated then saturated then supersaturated
You need to give us the text, how would we know what to answer if we don’t know what text were reading. All I can help you with so far is to reread the text and see what the author says
