The correct answer is C) free verse.
The poem is written is free verse.
The poem was written by African American author Langston Hughes in 1920, when he was 17 years old, on his way to pay a visit to his father that was in Mexico. He wrote the poem in free verse when he was crossing the Mississippi River.
Langston Hughes (1902-1967) was an author and social activist, better known as the leader of the movement called the Harlem Renaissance.