Concept:Power that allowed colonial rulers to override local decisions is the key feature of dictatorship.Explanation:The colonial government acted as a “virtual dictator” because it had the power to reject or override the laws and decisions made by local bodies.The Reserved veto powers enabled the colonial Governor to veto bills or decisions of the Legislative or Executive Councils.This made the local councils weak and gave the colonial administration absolute authority.Therefore, the key feature was reserved veto powers.Answer:D. Reserved veto powers