A b c d pls help ???

Columbus

Explanation:

Columbus died in Spain in 1506 without realizing the great scope of what he did achieve: He had discovered for Europe the New World, whose riches over the next century would help make Spain the wealthiest and most powerful nation on earth.

the answer is mass marketing.

the map that was shown mostly had eastern asia highlighted. the answer would mostly likely be "the spread of communism into eastern asia set the stage for the korean war."

hopefully this .