<span> I showed them the papers, which were written in very beautiful language and full of fratellanza and abnegazione , but which really said, with the adjectives removed, that I had been given the medals because I was an American</span>
Answer = A
Explanation = A pluralistic nation is diverse (consisting of many cultural groups) with tolerance towards each other.
The correct answer is <span>riots of Harlem, which broke out in response to African Americans’ frustration at job discrimination, police brutality, poor treatment by the armed forces, and lack of access to economic opportunities.
There isn't much to explain here - black people thought they weren't represented properly in the American society, which is why they rebelled. There were many attempts to crush their rebellion which is obvious if you read Robinson's letter.
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