单选题
The author introduces Martin Hughes at the beginning of the passage ______.
A、
(A) to show he and his wife are both environmentally conscious
B、
(B) m serve as the background of his life story
C、
(C) to introduce the topic of "green tag"
D、
(D) to encourage the readers m follow suit
【正确答案】
C
【答案解析】
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