What was the primary factor in America entering World War II?
the resumption of unrestricted submarine warfare
the passage of the Lend-Lease Act
the renewal of Nazi aggression
a suprise attack on United States soil

Surprise attack on American soil.

Explanation:

On December 7th 1941 Japan bombed an american naval base known as pearl harbor. Pearl Harbor is close to Japan because it is an island far west of the united states but is considered a state. So it was a attack on American soil by the Japanese air force and kamikaze fighters. After the attack Japan and Germany (+ Axis Powers) Declared war on the United States. But according to Hitlers plans to take over the world he wanted to attack north america last. So technically we can thank the Japanese we are still the United States of america and not speaking German.      

(d) rivers.

explanation:

civilizations developed around rivers because their waters provided places to hunt and fish. also, as the rivers flooded, the lands around them became fertile. this allowed them to support farming. this is especially true of the nile river, which flooded the same time each year.

a more perfect union: the creation of the u.s. constitution. the vote was unanimous. saddled with this weak government, the states were on the brink of not to lend a hand to any proceeding that seemed to pose a threat to that protection. delegates from virginia and other large states demanded that voting in