Which source would be most credible for a research paper about the safety hazards
of football?
A. A statement by the commissioner of the National Football League (NFL)
B. A book by a doctor who practices sports medicine
C. A dot-com website that allows athletes to check their symptoms
D. An article about football safety by a professor of literature HELPPP

Which source would be most credible for a research paper about the safety hazards of football A A statement by the commissioner of the National Football League class=