Which of the Following Describes Why Hydrothermal Vein and Disseminated

Which of the following describes why hydrothermal vein and disseminated deposits are important to society?

A) source of valuable metals such as copper, lead, and gold
B) easy to mine because they are found in aquifer materials
C) are the primary source of pure sulfur
D) sometimes contain diamonds
E) are the primary source of water-based minerals such as gypsum