单选题 Which of the following is wrong about professionals and amateurs?

A、 No clear-cut distinction can be drawn between professionals and amateurs in science.
B、 Amateurs' participation into scientific research has become more difficult.
C、 There is no discriminations of professionals against amateurs in geology.
D、 Entrance to professional geological journals has become harder for amateurs.

【正确答案】 C

【答案解析】[C]“在地质学上，已经不存在专家和业余爱好者的区别对待”与文章中的“Amateurs，on the．．．old way．The overall．．．for amateurs”不一致。故选[C]项。