GIVING BRAINLIEST PLEASE HELP!! -if you answer correctly ill give you brainliest which will give you 26pts-

What two developments in the communist world in 1949 counteracted the success of the Berlin Airlift and the containment policies of the United States? Select two correct answers.

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.