Great Britain won a war against Afghanistan in 1919, using native Indians as foot soldiers. Most of the native Indians began to question their treatment by the British, who used them as soldiers but continued to disrespect and mistreat them. So the correct answer is option c.
The British had traditionally wanted Afghanistan as a buffer state between India and the Russian Empire. In 1919, the Russian Civil War was raging and any threat from Russia to India at the time was potential rather than real.
The third Anglo-Afghan War, also known as the Third Afghan War, the British-Afghan War of 1919, or in Afghanistan as the War of Independence, began on 6 May 1919, when the Emirate of Afghanistan invaded British India. A large number of native Indians were used as soldiers in the war and they fought very well. But still, Britain mistreated native Indians which encouraged Indians to raise questions against them.
Learn more about the Anglo-Afghan wars here
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