What weapons technology of the 20th century had the greatest impact on world history? A. Radar and sonar technology had the greatest impact on world history.
B. Air force technology had the greatest impact on world history.
C. Nuclear weapons had the greatest impact on world history.
D. Tanks and other heavy vehicles had the greatest impact on world history.

What was the main point of helen hunt jackson's book, century of dishonor? a.it showed how unfairly american settlers were treated by the us government. b.it proved that american government was not responsive to the will of the people. c.it made the point that free land was no longer available to new settlers out west. d.it outlined the poor treatment of the native americans by the government.