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Explanation:

A) was the foundation for the Declaration of Independence.

B) allowed black colonists freedom centuries before emancipation.

C) allowed colonists to import slaves from Africa to work on southern plantations.

D) was the first example of colonial European self-government in northeastern North America.

its D

Explanation:

The Mayflower Compact was important because it was the first document to establish self-government in the New World. It remained active until 1691 when Plymouth Colony became part of Massachusetts Bay Colony.

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