List the 14 states that had areas with slave population of more than 30 percent in 1860

What was the effect of the industrial revolution on the working class?

What river systems the worlds earliest known civilization develop ?

The mass extermination of jews as part of the holocaust during world war ii caused the displacement of millions of jewish survivors. a large portion of them immigrated to which location? a. united states b. poland c. north africa d. palestine e. soviet union