Islam spread through military conquest, trade, pilgrimage, and missionaries. Arab Muslim forces conquered vast territories and built imperial structures over time.
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B) Striking workers in Poland started the Poznan uprising. The Poznan protests, which took place in 1956, were several massive protests against the government of Poland, for workers to receive better job conditions, however the government met this with violent repression.
Because it may lead to tyranny
The second one “Federal authorities gradually shift power back to the states”