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By the end of the seventeenth century, Virginia had established tobacco as its main crop, a representative government, and slavery as a dominant system of labor. In 1606, a group of wealthy London businessmen petitioned King James I for a charter to establish a colony in the New World.

Explanation:

the effect of the ming leaders banning ships with more than two masts was that there was no further construction of ships masts, because there was a surplus. ming emperors disallowed foreign exploration