Four Standard Time Zones for the Continental U.S. Were Introduced. At first the railroad managers tried to address the problem by establishing 100 different railroad time zones. With so many time zones, different railroad lines were sometimes on different time systems, and scheduling remained confusing and uncertain.
The Support Our Law Enforcement and Safe Neighborhoods Act (introduced as Arizona Senate Bill 1070 and thus often referred to simply as Arizona SB 1070) is a 2010 legislative Act in the U.S. state of Arizona that at the time of passage in 2010 was the broadest and strictest anti-illegal immigration measure passed in the United States.[2] It has received international attention and has spurred considerable controversy.
Your best choice is "B. the rise of aggressive nationalism among some of the nations defeated in World War I". I hope this helps! :)
Have a great rest of the day.
