Which statement best explains how Peter the Great and Catherine the Great expanded their power at the expense of Russia’s serfs?(1 point) Responses Both forced serfs to fight in the military for 25 years. Both forced serfs to fight in the military for 25 years. Both forced serfs to build St. Petersburg. Both forced serfs to build St. Petersburg. Both created the Charter of the Nobility. Both created the Charter of the Nobility. Both gave nobles more power over Russia’s serfs.