I disagree because we all know that the earth isn't flat and way back when when this happend they didn't had all of the tecnolgy that we have today so then how did he think that the earth was flat even though after the one persons presentation of the earth that he was still questioning the person that was giving the presentation.
One of the inventions in 1400s was improved gunpowder, which gave the imperial powers more military power.
Also, the development of ship building has enabled the Portuguese to establish and maintain a number of trade posts in Africa, which were a beginning of their colonial invasions.
The president signs a bill and allows it to become a law.
its the answer