Answer:
The statement "it reflected Egypt's willingness to work with the Soviet Union" best describes why Egypt's purchase of weapons from the Soviet Union was significant.
During the Cold War, the Soviet Union and the United States were engaged in a global struggle for influence and power, known as the Cold War. The United States was a major ally of Israel, while the Soviet Union supported Arab countries, including Egypt. By purchasing weapons from the Soviet Union, Egypt signaled its willingness to work with the Soviet Union and to align itself with the Soviet bloc. This move increased tensions between Egypt and the United States and further destabilized the Middle East. However, it is important to note that Egypt's decision to purchase weapons from the Soviet Union did not necessarily reflect a move towards communism or a rejection of US support.