Step 1: Understanding the Concept:
This question quotes a famous line from Martin Luther King, Jr.'s "I Have a Dream" speech and asks which group of people it refers to.
Step 2: Detailed Explanation:
The full quote, which itself is a reference to the Book of Amos in the Bible, is "No, no, we are not satisfied, and we will not be satisfied until 'justice rolls down like waters, and righteousness like a mighty stream.'" Martin Luther King, Jr. spoke these words in the context of the Civil Rights Movement, demanding an end to racial segregation and discrimination against African Americans. At the time, the term "Negroes" was commonly used to refer to Black people, and it is the term King himself uses throughout the speech to identify the group seeking justice.
Step 3: Final Answer:
The quote refers to the struggle of the Negroes (African Americans) for justice and equality. Therefore, option (B) is correct.