The muscle cell fluid of an athlete was tested immediately after a 1 O m race and was found to contain a high
concentration of lactic acid. Explain what could have caused this. The

• A.athlete must have eaten food containing lactic acid just before the race
• B.Athlete must have injected lactic acid into his blood just before the race
• C.athletes muscle must have carried out anaerobic respiration during the race
• D.athlete must have inhaled lactic acid from the environment during the race