How did the portuguese efforts to reach asia differed from columbus’s effort

Explanation:

Portugal were the first to discover it was possible to sail around Africa a fact that no one really knew it was possible in Europe and so they went East in 1488 4 years before Columbus proposed it was faster to go to the west not knowing that there was another piece of land in the way.

answer; (d) i believe that the correct answer is americans finally ran out of ammunition;