African america poet langston hughes attended new york's columbia university in the early 1920s. how does the culture of the author relate to his poem, which was written in 1922?

a.
langston hughes is writing of the importance of african american contributions.
b.
langston hughes traveled far across the world to study ancient rivers.
c.
langston hughes thought the culture of african americans was not widespread.
d.
langston hughes cannot relate to the migration of people from africa to america.