Which statements describe the st. lawrence seaway?
(1)- the st. lawrence seaway connects the st. lawrence river with the arctic ocean.
(2)- the st. lawrence seaway is important for canadian and u. s. trade.
(3)- the st. lawrence seaway provides an important trading route for the u. s., but has little value for canada.
(4)- the st. lawrence seaway connects the great lakes, the st. lawrence river, and the atlantic ocean.