Question

Which option is a credible
source?(1 point)
Responses

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

The credible source in this list is: an article published by a doctor about the benefits of exercise.