Which option is a credible source. a an interviewer with the president of a construction company about safe work conditions. b by a doctor about the benefits of EXERSIZE. C An interview With the spouse of a politician running for office. D An article written by a student about the length of THE school year

Option A is the most credible source. An interviewer with the president of a construction company about safe work conditions would likely provide accurate and verified information related to the company's safety practices.