【单选题】

The article was written to explain ______.
A．the greenhouse effect

B．the models of solar-weather interactions
C．the solar effects on 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：

6%的考友选择了A选项

2%的考友选择了B选项

3%的考友选择了C选项

89%的考友选择了D选项

The article was written to explain ______.A．the greenhouse effect