Answer:
St. Lawrence, Mackenzie, Yukon and Nelson
Explanation:
Nelson is 400 miles long and it goes into the United States. Yukon is 1,890 miles long but most of it goes through Alaska. Mackenzie is the longest river in Canada and is 1,080 miles long. St. Lawrence is 743.8 miles and its name means "big waterway." I hope this answers your question!
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