Answer:
The correct response is Option C. The American people rejected internationalism for isolationism.
Step-by-step explanation:
The 1920 presidential elections were the first elections held after WWI and the United States were deeply disillusioned with the progressive kind of reforms that former leaders like Teddy Roosevelt and the incumbent president Woodrow Wilson had implemented. The country was heading into a recession and the public wanted to avoid becoming embroiled in international problems that had recently lead to conflicts and wars like WWI. Therefore the public was much more isolationist and there was very little popular support for entering the League of Nations.