Answer:
Spain, England, France. Germany had very little exploits in the americas as it wasnt a united state until 1871, and Italy had little to none in america because it wasnt united until the 1860's - 1870's.
Step-by-step explanation:
Spain, England, and France
Spain conquered a lot of the west and Florida.
England discovered the colonies
France settled a lot of the north
Hope this helps!
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