Which of the Statements Regarding Economically Valuable Igneous Rocks or Minerals

Multiple Choice

Which of the statements regarding economically valuable igneous rocks or minerals is NOT true?

A) The fact that they crystallize at lower temperatures than most other minerals accounts for economically valuable concentrations of some minerals.
B) Solution and hot fluid redeposition form economically valuable concentrations of some minerals.
C) Valuable stones, such as emerald and topaz, are found in felsic pegmatitic rock.
D) Gold, silver, copper, lead, and zinc often form near mafic and ultramafic igneous rocks.