(E) Only one type of gold deposit warrants exploration, since the other types of gold deposits are unlikely to yield concentrated quantities of gold.
8. It can be inferred from the passage that the efficiency of model-based gold exploration depends on which of the following?
Ⅰ. The closeness of the match between the geological features identified by the model as critical and the actual geological features of a given area
Ⅱ. The de美国GREe to which the model chosen relies on empirical observation of known mineral deposits rather than on theories of ore-forming processes
Ⅲ. The de美国GREe to which the model chosen is based on an accurate description of the events leading to mineralization
(A) Ⅰonly
(B) Ⅱ only
(C) Ⅰand Ⅱ only
(D) Ⅰ and Ⅲ only
(E) Ⅰ,Ⅱ and Ⅲ
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