31. James lives in Smoke Town. He wants to go to Black Town on August 19. How can he get there? (A) Take Train RL202 to Green City, get off there, and take the free bus. (B) Take Train RL103 to Green City, get off there, and take the free bus. (C) Take Train RL102 to Spring Town, get off there, and take Train RL201. (D) Take Train RL101 to Cloud City, get off there, and take the free bus.