What happened to Central Asia and the Caucasus when the Soviet Union collapsed in 1991? A. The regions were divided into eight independent countries.
B. Russians fled the regions.
C. The regions came under the influence of Eastern Europe.
D. The regions united under an Islamic government.

Which technological breakthrough of the 1950s revolutionized the way that americans kept up with news and world events? a) radio b) internet c) television d) motion pictures

According to ohrp, a problem is an “unanticipated problem” when it meets which of the following criteria: unexpected, related or possibly related to the research, suggests that the research does not put the subjects or others at greater riskunexpected, related or possible related to the research, suggests the research puts subjects or others at greater riskunexpected, unrelated to the research but still occurring with a subject, suggests the research puts others at greater riskexpected, related or possible related to the research, suggests the research puts others at greater risk

What greek scientist created a screw to move water for irrigation?