What wave of migration occured in the us between 1609 and 1775

First Modern Immigration Wave, 1609-1775 Many of these new arrivals were indentured servants, under contract to work for masters from four to seven years merely to pay the costs of their transatlantic passage. The first black Africans to come to America during this period also came as indentured servants.

Explanation:

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the awnser is a

it is not b or c