The correct option is A Famous football player injured
The correct headline for the given context is option A. The function of a headline is to provide the reader an overall idea of the whole incident mentioned. "Famous football player injured" mentions that the incident has already occurred and the person indicated is identified and known. Option B is incorrect as 'A famous football player' does not indicate any individual. Option C is incorrect as the tense in the headline should indicate the time of occurrence of the incident and the details can be mentioned in the article. Option D does not explain the context at all.