Rank the Greatest InventionsRank these inventions according to the commercial impact and wealth they've brought to Canada (how you define that is up to you) . Drag your answers to the right and click the 'submit' button. Order the items from the following list. First select an item with the spacebar to show a menu of possible ranking positions. Next, click a ranking position to order it in the ranked list. Note the menu will display more ordering options as you add items to the ranked list.
Drag items from the left-hand list into the right-hand list to order them.
