The correct answer is C) the establishment of a free public elementary school system throughout the country.
The action taken by the French government in the early 1900s that contributed to the success of reform efforts to separate church and state was the establishment of a free public elementary school system throughout the country.
On December 9, 1905, the government of France took one important measure that separated the church from the state. The Chamber of Deputies passed the1905 French Law of the Separation of the Churches and the State. Emilie Combes was the leader of the Left Coalition that governed France in that time and it considered that it was good for France to establish state secularism.