Help please I don’t know what these answers please help!!

European expansion into africa left native regimes intact but had a strong impact on local societies what does this mean

Why do you think jefferson thought lewis was qualified to explore the louisiana purchase? ?

What is the significance of the battle of saratoga? a. the defeat at saratoga allowed the british to invade new england by land. b. after the defeat at saratoga france refuse to sign a treaty with the united states. c. the british won a decisive victory at saratoga. d. after the victory at saratoga france gave open support to the united states including arms money and ships.