Answer:
The correct answer is 4. The key difference between the modern Democratic and Republican parties is that Republicans believe in cutting taxes, while Democrats don't.
Step-by-step explanation:
The Democratic Party and the Republican Party are the two major political parties of the United States of America, and they have very different philosophies and ideas about government.
The Democratic ideology defends a greater intervention of the government in the economy, and a more liberal and leftist philosophy.
The Republican ideology bets on a lesser performance of the government, defends more conservative ideas and the reduction of taxes.