Correct answer: A. Expansion from representative politics to popular politics
Explanation: The sequence from the Estates General to the Women's March shows the widening social base and changing forms of revolutionary politics. At first, the Estates General and the National Assembly represented formal political participation by deputies. Soon, however, political action moved beyond assembly halls. The Third Estate claimed national representation, crowds in Paris stormed the Bastille, peasants challenged feudal burdens in the countryside, and women marched to Versailles over bread and royal responsibility. These events connected representative institutions with direct action by ordinary people. Option A is correct because it captures the expansion from representative politics to popular politics. B, C and D are too narrow: diplomacy, Church reform or trade disputes cannot explain the participation of urban crowds, peasants and women across different settings.