I’m not sure i just need to get points so i’m answering
I think it would be the diversification of races and culture that the United States have today. Immigration have changed and shifted United States in politics, economics, social and culture that enables the US to be what it is today. Diversification plays a significant role in the US because it shifted the policies of the country and it makes the country more flexible and achieve a level of prosperity and progress in all aspects.
Confirmed the answer is D. winning the electoral votes from one state does not mean that a candidate won all the popular votes from the state.