The correct option is A 1887
Cambodia, Laos and Vietnam popularly known as Indo-China were colonised by France in 1887. The natives of these regions resisted the imposition of French language and culture on them. During the first World War, about 100,000 Indo-Chinese fought on behalf of France. The knowledge of how French fought the world war and the communist ideas from mainland China influenced the Indo-Chinese people to rise against the colonial power.