Final answer:
The UK, France, and Israel attacked Egypt in the 1956 Suez Canal Crisis after Egypt nationalized the canal and restricted it to Israeli shipping. The invaders withdrew under international pressure, marking a shift in regional power to the United States.
Step-by-step explanation:
The United Kingdom, France, and Israel attacked Egypt over access to the Suez Canal. The correct answer to the question is "A. Egypt." This attack occurred during the Suez Canal Crisis of 1956 after Egyptian President Gamal Abdel Nasser nationalized the canal, which had been under the control of the British and French and immediately closed it to Israeli shipping. In response, Israel invaded Egypt on October 29, and subsequently, Britain and France joined the military operation.
The crisis escalated as the Soviet Union threatened to intervene and the U.S. President Dwight Eisenhower urged for a ceasefire, leading to economic pressure and the withdrawal of the invading forces. This event marked a significant shift in global power dynamics, indicating the rise of the United States as a leading power in the Middle East over Britain and France.