Global human population:

A. is currently shrinking due to higher death rates.

B. has doubled at an accelerated rate since the industrial revolution.

C. has risen at a constant rate since the Middle Ages.

D. uses fewer resources per capita each year as it grows.

The correct answer is:

B. has doubled at an accelerated rate since the industrial revolution.

Explanation:

Due to the numerous changes in the human life-style since the industrial revolution in the 18th century, the accelerated number in the increase of population has been really evident with 4 billion more people in the world since the 50s. This was mainly due to the fact that, before the industrial revolution, families normally lived in the countryside in a much quieter and slower environment, which has changed dramatically with the passage of time. Most of people began moving to the cities looking for jobs; reason that led them to have a much more accelerated life, based on the consumerist principles of the new societies. And therefore, it was normally accepted that the families were much more numerous, since they had provisions for sustenance. Besides, it is important to know in order to see the answer to this question even clearer that, the human race reached the first billion of people near the 1800s, the the population grow slow but significantly until 1950 in 2.5 billion, and it was after the industrial revolution that the human race reached 6.5 billion by the year 2005 according to the United Nations.