单选题 If a person finds getting up early a problem, most probably ______

A、 he is a lazy person
B、 he refuses to follow his own energy cycle
C、 he is not sure when his energy is low
D、 he is at his peak in the afternoon or evening

【正确答案】 D

【答案解析】细节辨认题。由第二段"'Get up, John! You'll be late for work again!' The possible explanation to the trouble is that John is at his temperature-and-energy peak in the evening'可得出正确答案为D。