A for sure, I don't think any of the others are correct
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.
Theres your answer if the quick box don't help go check out the website
Answer:
Powers of the House and Senate Each house of Congress has the power to introduce legislation on any subject except revenue bills, which must originate in the House of Representatives. The large states may thus appear to have more influence over the public purse than the small states.
Sum it up in your own words, have an amazing day!