The Industrial Revolution increased the overall amount of wealth and distributed it more widely than had been the case in earlier centuries, helping to enlarge the middle class. ... Their miserable conditions gave rise to the trade union movement in the mid-19th century.
During the Cold War era, the main reason why the United States and the Soviet Union were reluctant to engage in direct military conflict because there was a great potential for global nuclear destruction. ... This gigantic global struggle was known as the Cold War.
Cristiano Ronaldo is Portuguese professional star soccer player who plays for club Real Madrid in Spain. He has won the Ballon de oro- or for short- Ballon D'or, four times. This award is given to the best soccer player in the world each year.
<span>Assuming that this is referring to the same list of options that was posted before with this question, the best option would be "highly contentious, since these were the years surrounding the Civil War, which was the largest conflict in US history. </span>
