The correct answer is (b), Canada.
Uranium City is a town in northern Saskatchewan, Canada. It was founded in 1952 as a mining town to support the nearby Eldorado Mine, which was the world’s largest producer of uranium at the time. The town reached a peak population of over 5,000 in the 1950s and 1960s, but declined sharply after the mine closed in 1982. Today, the town has a population of around 800 people.
The other options are incorrect. Australia is a major producer of uranium, but it does not have a town called “Uranium City”. Canada is the only country that has a town with that name. Russia is a major producer of uranium, but it does not have a town called “Uranium City”. The United States is a major producer of uranium, but it does not have a town called “Uranium City”.