Read the following passage from a 1933 speech by United States President Franklin Roosevelt. Which of the following is the same type of source as this speech?

“Happiness lies not in the mere possession of money; it lies in the joy of achievement, in the thrill of creative effort. The joy and moral stimulation of work no longer must be forgotten in the mad chase of [short-term] profits. These dark days will be worth all they cost us if they teach us that our true destiny is not to be ministered unto but to minister to ourselves and to our fellow men.”

—Franklin Roosevelt, Inaugural Address, 1933
A. A letter written to Roosevelt attacking the views he expresses in the speech.
B. A criticism of the speech written in 2010 by one of Roosevelt’s great-grandchildren.
C. A scholarly article analyzing the speech’s importance written by an expert historian.
D. A documentary film featuring readings of the speech by modern actors.