At a first aid station on a marathon route, a patient after the race complains of headache, muscle ...

A
Excess intake of hypotonic solutions (e.g., several large bottles of water) will result in hyponatremia, the symptoms described by this patient. Sports drinks contain electrolytes lost through perspiration, so this would not explain the patient's symptoms, indicating hyponatremia. Steroid administration can result in hypokalemia, but the patient's symptoms do not match the symptoms of hypokalemia, so this is not a good explanation. The statement about diabetes does not provide information relevant to the patient's symptoms or to the situation.