What obstacle did Thomas Edison have to overcome before he could perfect his invention?

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.

During the age of imperialism, suez canal connected which two bodies of water?

Explain how the woman's auxiliary contributed to the war effort.