B. He distanced himself from Progressive politics.
Explanation:
Harding was 29th president of United States of America. His political history in America was during 1890-1932. Harding won the president election in 1920.
After becoming the president of United States of America, Harding formulated many policies to reduce the role of government in the economy. Harding signed “Budget and Accounting act” and “Fordney-McCumber Tariff” which made great impact in the U.S. This causes major increase in tariff rates. Harding was not much interested in advanced politics.