How can changes after October be understood in three social, economic and political categories?

Correct answer: Abolition of titles was social, bank nationalisation was economic and one-party rule was political change

The governing concept is classification: historical changes should be placed under the social, economic, or political dimension they most directly affect. Abolishing hereditary titles challenged old social privilege and therefore represents a social change. Nationalising banks transferred control of financial institutions to the state, so it is an economic change. Establishing one-party authority changed the organisation and exercise of political power, making it a political change. Option A correctly matches all three examples. The other options contain invented events, reverse the direction of the Revolution, or assign unrelated developments to categories. A strong answer therefore checks each example separately rather than treating every post-October measure as belonging to one single dimension.