Explanation
Correct answer: A.
Choice A is the best answer because it most accurately states the main idea of the text. The text begins by stating that Tomas and Tereza’s dog Karenin felt disrupted by a recent move because of his dislike of change. The text then goes on to suggest that this is because the way a dog experiences time differs from the way humans experience time: time for a dog doesn’t move linearly, going "on and on, from one thing to the next," but instead moves circularly, "like the hands of a clock." That is, time for a dog is experienced as a cyclical pattern characterized by routine and predictability, with each day "following the same path." The text then concludes by providing examples of seemingly insignificant changes in routine that profoundly "disturbed [Karenin’s] sense of time," causing him to feel displeasure. Thus, the main idea of the text is that Karenin’s sense of time as a dog involves a strong preference for predictability and an aversion to disruption.
Why the other choices are wrong
Choice B
Choice B is incorrect. Although the text emphasizes Karenin’s displeasure with the recent move to a new home, it doesn’t suggest that the move has made his negative responses more pronounced than they once were. Rather, in accounting for Karenin’s displeasure with the move to Switzerland, the text explains that Karenin generally has a negative response to any kind of change.
Choice C
Choice C is incorrect because the text doesn’t suggest that Karenin comprehends time similarly to how Tomas and Tereza comprehend it. On the contrary, the text strongly implies a contrast between dogs’ circular experience of time with the way humans experience time as a straightforward progression that can be "plotted on a straight line."
Choice D
Choice D is incorrect because the text provides no indication that a change in the places and objects surrounding Karenin causes him to feel as though time is accelerating. Although the text does use the language of "dash[ing] madly ahead" in relation to time, the phrase appears in the context of a comparison illustrating how dogs experience time: time for a dog moves just as the hands of a clock do, in a circle and "unwilling to dash madly ahead"—that is, always in a regular and predictable way.