【单选题】

The article was written to explain______.
A．the greenhouse effect

B．the greenhouse effect
C．the solar effects on the earth
D．the causes affecting weather

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根据网考网移动考试中心的统计，该试题：

28%的考友选择了A选项

4%的考友选择了B选项

5%的考友选择了C选项

63%的考友选择了D选项

The article was written to explain______.A．the greenhouse effect