Correct answer choice is:
(1) Opposition to joining the League of Nations.
Step-by-step explanation:
Return to normalcy, a reversion to the form of life ere World War I, was United States presidential nominee Warren G. Harding's operations motto for the referendum of 1920. Harding's obligation was to reverse the United States' pre-revolutionary intellect, outwardly the idea of war contaminating the thoughts of the American personages.