France is the correct answer I believe
Plessy v<span>. </span>Ferguson<span>. </span>Plessy v<span>. </span>Ferguson<span>, </span>case<span> in which the U.S. Supreme Court, on May 18, 1896, by a seven-to-one majority (one justice did not participate), advanced the controversial “separate but equal” doctrine for assessing the constitutionality of racial segregation laws.</span>
The distribution of powers among the three federal branches- The Congress, The President and The Judiciary and between the national and the state governments had a positive impact on policy making. In this system there is the check and balance among the three branches which leads to criticism of wrong policies and adoption of good policies. More importantly the policies are discussed by the federal and state government as well and the decisions are taken on the basis of consent which ultimately leads to adoption of efficient policies by the government.
The answer is A pertaining to The League of Nations