Explanation
D: Constitutional Reforms
The Montague-Chelmsford Proposal, also known as the Mont-Ford Reforms, were proposed by the British government in 1918 and introduced in 1919. They were aimed at making significant constitutional reforms in India, including the introduction of dyarchy (a system of dual governance) at the provincial level, the extension of responsible government, and the establishment of a federal structure. The proposals were a significant step towards Indian self-government, although they fell short of Indian nationalist aspirations for complete independence.