Which of the following is false concerning refugees in recent world history? A. Arabs relocated peacefully in Israeli territory. B. Europeans in World war 2 relocated due to Nazi rule. C. Koreans and Eastern Europeans fled Communist regimes. D. Africans currently escape the threat of ethnic conflicts.

Some gamma ray bursts are hypothesized to come from mergers of neutron stars or black holes. if this hypothesis is correct, what else should we in principle be able to detect from such mergers? a. gravitiational waves b. x-ray bursts c. significant disruption of gas thousands of light-years away in the surrounding galaxy d. an "afterglow" of bright visible light, lasting for weeks