The land bridge that existed between Asia and North America is now O A. the Arctic Circle.
O B. Alaska.
O C. Siberia.
O D. the Bering Strait.

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answer; /// i believe that the correct answer is (b)///they gained vast amounts of

the answer would be logic.

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