-The purpose of the passage is to explain……………

A)some experimental methods of geological investigation

***B)why geology is a science suitable for enthusiasts' contribution

C)gradual developments in the field of geology over the years

D)why it is so difficult to gather geological information

E)how experts analyse geological data gathered in the field

A)is vital to almost every part of the geologist's work

B)is of no use whatsoever in the development of geology

C)may be easily mastered and used by the amateur

***D)only plays a small part in the field of geology

E)is much the same as that used in other scientific fields