Two boxers bump heads in a boxing match. The referee will check for a concussion on one of the boxers. Consider a null hypothesis, , that the boxer does not have a concussion, and an alternative hypothesis, , that the boxer did get a concussion. The referee has two possible decisions: stop the match due to injury (reject the null hypothesis) or allow the match to continue (do not reject the null hypothesis). If the referee makes a Type I error, what happened?

A. He allowed the match to continue, and the boxer did not have a concussion.
B. He stopped the match due to injury, but the boxer did not have a concussion.
C. He stopped the match due to injury, and the boxer did have a concussion.
D. He allowed the match to continue, but the boxer did have a concussion.