Respuesta :
The best option from the list would be that "c. Migration during the 20th century was influenced by several factors, including war and politics, urbanization, and economic opportunities," since the 20th century was dominated by war--World War I, II, and the Cold War especially.
The correct answer is "C": Migration during the 20th century was influenced by several factors, including war and politics, urbanization, and economic opportunities.
During the 20th century, many immigrants came to the US not only for economic opportunities but also for the rapid growth of industrialization and urbanization. More than 20 million immigrants came from Central, Eastern and Southern Europe. Besides, Jews from Eastern Europe arrived in large numbers fleeing religious persecution. After the Second World War, Congress passed special legislation allowing refugees from Europe and the Soviet Union to enter the United States. The US provided immigrants with job opportunities due to the process of industrialization which also led to an increasing urbanization in the big cities.