单选题
Copernicus had his book published because ______.
A、
he didn't agree with Aristotle
B、
he couldn't hide the scientific troth
C、
he worked for the church
D、
his friends advised him to do so
【正确答案】
D
【答案解析】
解析：由文章最后一段可知，哥白尼是因朋友的建议才出版书的。
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