If this question regards the rapid population growth of HUMANS in a region, then I believe the most plausible answer would be D.
It is highly unlikely that natural environments such as forest land would be expanded, in actuality this land area would decrease, as a result of people building and developing on these areas. This is due to more room being needed as a result of the sudden rise in population.
True because neither one of them got what they wanted and was both without things
The "he" here is Constantine the Great, and he moved the capital of the Roman Empire to the city named Constantinopole, previously Byzantium, which today is known as Istanbul, Turkey's biggest city.