Minamata Disease, Which Affected People Living near Minamata Bay in Japan

Minamata disease, which affected people living near Minamata Bay in Japan, was finally traced to:

A) a vitamin deficiency due to a restricted diet of rice and fish.
B) a diet including shellfish contaminated with mercury.
C) a diet including seaweeds contaminated with lead from a nearby plastics plant.
D) high levels of DDT from local rice farms.