Answer:
C. Waterway
Step-by-step explanation:
The waterway is the mode of transportation used to transport goods over the water bodies across the globe to make transport convenient for covering a large distance. It is also considered a cheaper source of transportation in case heavier goods to transport to far distance. There are many water transport is used like; Ships, ferries, tug boats, sailboats, etc. and it travel over various bodies of water such as oceans, lake, canals, and rivers.
In the given case, Limestone is transported to Chicago's steel mills through upper great lakes.