Answer:
c. has grown deep over time.
Explanation:
In the poem "The Negro Speaks of Rivers," the author talks about the many locations where black people have inhabited. He refers to these places by talking about the rivers that are present there, including the Euphrates, the Congo, the Nile and the Mississippi. The author then compares the rivers to his soul in the following line:
"My soul has grown deep like the rivers"
