A is the correct answer.
Okinawa was seen as the final piece in the Pacific puzzle. After Okinawa, US troops began massing in China for an invasion of Japan. This ultimately didn't happen as Atomic weapons were dropped.
It was determined from chemical analysis and observations by the EPA in the 1970's that the Love Canal in New York is considered to have "contaminated with toxic chemicals." Due to these, the canal was furthermore restricted to any human activities taking place due to the hazards it would produce.
Answer: Andrew Jackson was the president for the common man . under his rule american democracy flourished as never before but the economy and the native american population suffered at his hands
Explanation:
The answer is A, natural selection.