Which Statement Below Is True

Which statement below is true?

A) Most metallic elements are found in the lithosphere in oxidation state zero.
B) There exists little correlation between the abundance of an element in the lithosphere and its commercial extraction and use.
C) The United States has plentiful ore fields of all strategic metals.
D) New mining techniques and relatively untapped ore fields mean that the environmental impacts of mineral extraction will decrease significantly in the future.
E) The most important commercial class of minerals is the silicates.