Which of the following is wrong about professionals and amateurs?A.No clear-cut distinctio
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.