The correct answer is: A. World War II.
The Bihar Legislative Assembly stopped functioning from 1939-45 due to the outbreak of World War II. The British government suspended all elected legislatures in India during the war, in order to concentrate on the war effort. The assembly was not reconvened until 1946, after the end of the war.
The other options are incorrect. The Freedom Movement in India was a long-running struggle for independence from British rule. It began in the early 19th century and culminated in the Indian independence movement of the 1940s. The Civil Disobedience Movement was a major campaign of nonviolent resistance led by Mahatma Gandhi in the 1930s.
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