Which outcomes are likely when a nation has open borders

Plz me match the correct text in each cell to identify the contributions to the war effort of the three facilities listed. 1. built b-29s, putting hundreds of the war's most advanced aircraft into service 2. large civilian workforce transported soldiers and goods to the two war fronts; built "liberty ships" to move men and supplies across the ocean 3. trained new recruits, held prisoners of war, repaired damaged aircraft, prepared thousands of soldiers for combat bell bomber plant military bases brunswick

When zhang qin went to explore west, he brought back stories of

Which groups of people most directly benefited from song innovations in the song dynasty‘s open border policy?