The correct options are
A Waterways are the cheapest for carrying heavy and bulky goods.
B Mostly, Sea and oceanic routes are used for transporting tonnes of goods.
C Navigable rivers and lakes are used as inland waterways.
Waterways are the cheapest way for carrying heavy and bulky goods. Sea routes and oceanic routes are mostly used for transporting tonnes of goods. Navigable rivers and lakes are used as inland waterways. The Great Lakes in North America is an example of inland waterways.