Lead-Zinc Deposits, Like Those Along the Mississippi Valley, Form When

Lead-zinc deposits, like those along the Mississippi Valley, form when:

A) lead and zinc minerals have a low density and rise to the top of crystallizing magma chambers
B) lead and zinc minerals are deposited by hot waters released from crystallizing granite
C) a change in Earth's atmosphere caused lead and zinc minerals to be deposited by seawater
D) deep groundwater, rich in lead and zinc, encounters buried hills of granite