Switzerland is coming the closest to having a pluralist society
I think the correct answer is A.
Following its ratification by the requisite three-fourths of the states, the 15th Amendment, granting African-American men the right to vote, is formally adopted into the U.S. Constitution. Passed by Congress the year before, the amendment reads, “the right of citizens of the United States to vote shall not be denied or abridged by the United States or by any State on account of race, color, or previous condition of servitude.” One day after it was adopted, Thomas Peterson-Mundy of Perth Amboy, New Jersey, became the first African American to vote under the authority of the 15th Amendment.
(It gave black men "previous slaves" the right to vote)
Because they thought it would be fair to let Germany get some of their lands back after the war.
Constituents
Members of Congress in both houses are elected by direct popular vote. Senators are elected via a statewide vote and representatives by voters in each congressional district. They are therefore accountable to their constituents since these are the citizens that elect them