1. The Boer War was the first time Canada sent troops overseas for a war.
2. The Naval Service Bill of 1910 created the Royal Canadian Navy.
3. The National Policy created higher tariffs for imported goods, creating revenue for the Canadian government, and allowing Canadian-based industries to gain a higher profit.
4. Not sure completely, on this one, but Wikipedia states "Nevertheless, the Alaska settlement promoted better understanding between the U.S. and Britain that worked to Canada's advantage in World War I." so you should look into that a little more.