Answer She starts enjoying and getting more interested in the story.
You can tell that by these following context clues, "Lily glanced up at the clock in the front of the classroom. The minute hand was crawling much too slowly" this shows that she was bored but then after a while, she says "Lily couldn’t wait to look at it."
The answer to this question is:
C-"Complex Sentence"
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B. changing the tone of voice, such as from an informative tone to a firm, persuasive tone
I believe the answer is: the dystopian world that Gregor enters as an insect, and Gregor's sudden transformation into a giant insect.
Something would be marked by illogical, terrifying, and disorienting complexity if that thing couldn't be accomplished with scientific method in any form.
The fact that a person could transform into insects pretty much tell that the world that become the sting of the writing is a dystopian or imaginative world.