Answer:
The poem is D) a ‘free verse’ poem.
Explanation:
Langston Hughes wrote this poem in 1921 following no metrical scheme or rhyme pattern. So, lines in every stanza vary in the number of syllables and there are no rhyming pairs to be seen.
The poem is characterized by repetition: the word ‘rivers’ and the names of world known rivers such as the Euphrates, the Congo, the Nile and the Mississipi can be read throughout the poem. There’s also repetition of the phrases such as ‘I’ve known’.
There are also continues similes like 'my soul has grown deep like the river' and 'rivers as ancient as the world'.
The different literary figures and the free verse genre allow the author to express the powerfulness and greatness of black history since older times.