What is the meaning of this passage??

D) King doesn't believe people are so set in their ways that they can't accept a beautiful future.
Answer:
D) King doesn't believe people are so set in their ways that they can't accept a peaceful future.
Explanation:
In this passage, King refers to conflicts such as racism and war as a "starless midnight." He also refers to a future which is free of these constrains as a "daybreak of peace and brotherhood." The use of these words conveys a hopeful perspective. Moreover, King argues that he does not believe that men are so set in their ways that they cannot eventually make the peaceful vision a reality.