Answer:
12. A. People spend too much time apart.
13. D. she purposely took the long way home each day so it was over eight hundred miles between them.
14. B. It describes Carla's favorite places she has visited.
15. D. She is overwhelmed after realizing how far they travel.
16. A. He is just as surprised as Carla.
17. D. tight
18. D. to emphasize Carla's delight in returning home
19. A. She felt a little weak just thinking of it. (Paragraph 1)