Irrelevant. This fails to address whether tourists deepen their understanding of a place when they spend more time there. The author focuses on how long tourists are in a place, not why they are there.

If tourists gain more understanding of a place once they’ve spent several days there and reading is like traveling, this suggests that readers gain more understanding by spending more time reading each book.

Irrelevant. This fails to address whether tourists deepen their understanding of a place when they spend more time there. The author uses reading and traveling as two different but analogous activities, both of which deepen understanding. Like (D), (C) mixes them together.

Irrelevant. This fails to address whether tourists deepen their understanding of a place when they spend more time there. The author uses reading and traveling as two different but analogous activities, both of which deepen understanding. Like (C), (D) mixes them together.

Irrelevant. This fails to address whether tourists deepen their understanding of a place when they spend more time there. Also, the author already said that people travel “to enlarge understanding rather than simply to acquire information.”