Which two (2) european countries were the first to invest (spend) a lot of time and resources into exploration?

Portugal, Spain,

Explanation:From this measure, the sailor could determine his latitude. ... Once there, they would sail east or west on that latitude until they reached land. Spain and Portugal were among the first European nations to explore because. they were bordered by the Atlantic Ocean and the Mediterranean Sea. and From this measure, the sailor could determine his latitude. ... Once there, they would sail east or west on that latitude until they reached land. Spain and Portugal were among the first European nations to explore because. they were bordered by the Atlantic Ocean and the Mediterranean Sea.

du boi was considered a radical because he wanted the immediate end for segregation. the biggest different between him and booker t. washington is that, even though washington believed that segregation should be considered illegal, he did not believe at all that a law was needed to keep blacks away from whites and that this would be something natural (to have the races apart) for a long time until society adjusted, while du boi believe that agitation was the only way to end segregation.