What effect does the imagery of Twain's travel experience through the American West have on the meaning of this excerpt?

It implies that people are not truly capable of leaving their home countries behind, and wherever they go, they are dissatisfied.

It suggests how homesick Twain is and hints that he can't wait to return to the United States and ride a stagecoach across the West.
It emphasizes Twain's lack of experience as a traveler by showing that he doesn't adapt well to new places and unfamiliar cultures.
It contrasts Twain's feelings about the ordered, uniform landscape of France with the wild, varied landscape of the American West.