Where do many of south asia major rivers begin

When conducting research for forming a hypothesis, which practice should historians follow?

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

If the ussrs economy has remained agricultural-based rather than industrial, then a. the unemployment rate among men would have been much lower b. women would have been less in demand in the workforce c. crop productivity would have led to larger , better nourished populations d. children would not have had to leave school early to work in factories