Trevor Is an Underweight Long-Distance Runner

Trevor is an underweight long-distance runner.To achieve a healthy body weight to improve his performance,he must ________.

A)  eat a high-kcalorie diet and exercise regularly 
B)  eat a high-kcalorie diet and reduce his exercise to minimal amounts 
C)  eat a high-protein diet plus exercise regularly 
D)  eliminate alcohol and exercise from his life 
E)  eat a high-protein, high-kcalorie diet and reduce his exercise to minimal amounts