Lake Superior is the largest freshwater lake in the world by surface area.

Discover Canada records this in one direct sentence about the Great Lakes. The guide writes: There are five Great Lakes located between Ontario and the United States: Lake Ontario, Lake Erie, Lake Huron, Lake Michigan (in the U.S.A.) and Lake Superior, the largest freshwater lake in the world. The status the test wants is therefore true — Lake Superior is the largest freshwater lake in the world.

Two precise commitments. Discover Canada commits Lake Superior to TWO specific facts: (1) it is one of five Great Lakes located between Ontario and the United States; (2) it is the largest freshwater lake in the world. So the source pinpoints both Lake Superior's named place among the Great Lakes and its named global ranking.

The named Great Lakes are five. Discover Canada commits the named Great Lakes to FIVE specific lakes: Lake Ontario, Lake Erie, Lake Huron, Lake Michigan (in the U.S.A.), and Lake Superior. So Lake Superior is the named largest of the five, and the largest freshwater lake in the world. Lake Michigan is named in the source as the only Great Lake entirely in the United States — the other four are shared with Canada.

The named Ontario context is rich. Discover Canada commits Ontario to specific named features: "Toronto is the largest city in Canada and the country's main financial centre." Ontario was founded by United Empire Loyalists and has the largest French-speaking population outside of Quebec. The named Niagara region is known for its vineyards, wines, and fruit crops. Ontario farmers raise dairy and beef cattle, poultry, and vegetable and grain crops. So Lake Superior — the world's largest freshwater lake — sits within the broader named Ontario landscape, alongside the other Great Lakes that form one of Canada's most important shared geographies with the United States. The named Great Lakes are central to Central Canada's geography and economy. So when the test asks whether Lake Superior is the largest freshwater lake in the world, the source-precise answer is true.

The question is testing whether new citizens know Lake Superior's global ranking among freshwater lakes. Discover Canada commits to one named superlative: the largest freshwater lake in the world. The right test answer matches that — true.

The wrong answer ("False") reverses the source — Lake Superior IS the largest freshwater lake in the world. The named ranking is exact in the source. Only the true answer matches.