Final answer:
Woodrow Wilson is the only U.S. president to have earned a Ph.D., which he obtained from John Hopkins University. He later become a key figure in the Progressive movement and appointed William Jennings Bryan as Secretary of State.
Step-by-step explanation:
The only president to get a Ph.D. was Woodrow Wilson, who earned it at John Hopkins University after completing his undergraduate studies at Princeton. Therefore, the correct answer to the question is c) Woodrow Wilson. Woodrow Wilson was a key figure in the Progressive Era, demonstrating bipartisan support for Progressive ideals during his presidency. His educational background and position as a leader and innovator in U.S. public administration make his academic achievements particularly noteworthy. In addition, it was Woodrow Wilson who, in his pursuit of applying American influence overseas based on moral imperatives, appointed William Jennings Bryan as his Secretary of State.