Answer:
The best answer to the question: What idea is King expressing through his metaphor comparing the civil rights movement first to a "tortuous road" and then to a "super highway of justice"? Would be, indeed, A: The journey for freedom will be long and difficult, but eventually it will end in victory.
Explanation:
The reason for this being the best answer comes from the metaphors themselves. When Dr. King speaks about the "turtuous road" that has led from Montgomery, Alabama, to Oslo, in Norway, he sets up the first reason why option A is the best one. By saying that, Dr. King is telling his audience that all the process, which started long before he was ever awarded the Nobel Peace Prize, in 1964, to achieve the recognition of African Americans, and stopping segregation and discrimination against them, was so hard, so difficult, and so long, that it did not just take a few years, but rather centuries; from the first slaves that attempted freedom, to the civil rights movement, and its epitome with the establishment of the Civil Rights Act of 1964. And then, he uses a second metaphor, which is the "super highway of justice", which allows us to understand that Dr. King hopes that at some point, the matter of discrimination and segregation against African Americans will become a complete thing of the past, rather growing bonds between the two races, as differences are forgotten and new progress is achieved through these bonds. This is what Dr. King would see as victory.
