The correct answer is option 3: Japan. In the 1950s and 60s, the people of Japan were severely affected by the Minamata disease, which was caused by mercury pollution. Minamata disease is a neurological syndrome that affected thousands of people, causing symptoms such as numbness, muscle weakness, difficulty walking, and loss of coordination. The disease was named after Minamata Bay, a region in Japan where a chemical company dumped large amounts of mercury into the water. The mercury contaminated the fish and shellfish in the bay, which were then consumed by the local population. The long-term exposure to mercury resulted in the outbreak of the disease. The Minamata disease serves as a significant example of the devastating effects of industrial pollution on human health.