单选题 In a hot, sunny climate, man acclimatizes by eating less, drinking more liquids, wearing lighter clothing, and ______.
A. skin changes that darken B. his skin may darken
C. experiencing a darkening of the skin D. darkens his skin

【正确答案】 C
【答案解析】由句子结构可知，and后要填一个动各词短语结构，与前面的短语保持一致。