Who took office as president of the U.S. in 1929?

Herbert Hoover took office as president of the United States in 1929, following his election victory the previous year. Hoover is known for his presidency during the onset of the Great Depression, which began shortly after he assumed office. His administration faced significant economic challenges, shaping his legacy and influencing subsequent economic policies in the United States.

The context surrounding Hoover's presidency is crucial to understanding his role in American history. He advocated for limited government intervention in the economy, believing that the private sector would recover on its own, which has been criticized in retrospect as the Great Depression worsened. Hoover's presidency is a pivotal moment in U.S. history as it set the stage for the new approaches taken by Franklin D. Roosevelt, who succeeded him in 1933.

The other figures listed are significant but belong to different time periods: Calvin Coolidge served as president from 1923 to 1929, Franklin D. Roosevelt was elected in 1932 and took office in 1933, and Harry S. Truman succeeded Roosevelt in 1945. Thus, Hoover is the correct choice for the year 1929.