Answer: Dr Martin Luther King Jr is giving a speech saying that he believe that one day in America, slavery and racism will end and all people will live in peace.
Explanation: Martin Luther king was a Civil Rights Leader
It is definitely not true that many small rural communities have best transport, so we can reject the option b) and d) together with it.
The best answer is that they don't have mass transit systems (a is the correct answer). It's not true that they can walk everywhere because they can for example be forced to walk to a different town if they need a hospital.
