Illustrate a conceptual image consisting of four different scenes symbolizing the given options. First scene to depict a conversation between two workers in hard hats at a construction site, indicating a discussion about safety. Second scene to show a doctor standing next to a treadmill, indicating her advocating for exercise benefits. Third scene to portray a student sitting at a desk, surrounded by calendars and school books, indicating an inquiry about the school year length. Last scene showing a person speaking to a crowd, indicating a political campaign.

Which option is a credible source?

A. An interview with the president of a construction company about safe work conditions
B. An article published by a doctor about the benefits of exercise
C. An article written by a student about the length of the school year
D. An interview with the spouse of a politician running for office

A. An interview with the president of a construction company about safe work conditions