Why did job specialization emerge in cities as civilization developed

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.

Why is it important that dr. luther king jr. use non-violent protest to create social change?

Plz the 10 places that charles darwin stopped at to report his findings, and include dates?