Final answer:
A) The Suez Crisis in 1956 was the event that brought Bevan and Gaitskell to a closer alignment of opinions, as they both opposed military intervention and favored diplomacy to resolve the conflict.
Step-by-step explanation:
The event that drew Bevan and Gaitskell closer over similar opinions was A) The Suez Crisis. During the Suez Canal Crisis of 1956, Britain, along with Israel and France, threatened to invade Egypt following the nationalization of the canal by Egyptian leader Gamal Abdel Nasser.
The crisis escalated to a point where global superpowers could have been drawn into direct conflict. Eisenhower's intervention, calling for the withdrawal of invading troops to avoid the Soviet Union from getting involved, brought the crisis to a peaceful resolution.
The Suez Crisis was significant in altering the dynamics of international power, casting the United States as the preeminent power in the Middle East and bringing about a decline in Britain's influence.
This crisis fundamentally aligned the views of Bevan and Gaitskell, leading figures in the British Labour Party, as they opposed the use of force and favoured diplomatic solutions.