How did the United States respond to the crisis in West Berlin in 1948–1949? It withdrew its armed forces from West Berlin.
It signed a peace treaty with the Soviet Union.
It insisted that East and West Germany be united.
It organized an airlift to send supplies to West Berlin.

Consider the events in alfred wegener's life that led to his development of the continental drift hypothesis. review the items below and determine whether each item is (1) an observation that led alfred wegener to develop his continental drift hypothesis, or (2) evidence wegener gathered to support his proposal.