Correct Answer: (d) Superior & Huron
Solution:The Soo Canal is located in the St. Marys River, which connects Lake Superior and Lake Huron. It bypasses the rapids of the St. Marys River, allowing ships to navigate between the two lakes. The Soo Canal is crucial for the movement of goods and resources, particularly iron ore, coal, and grain, between the upper Great Lakes and the lower Great Lakes.