Select the phrase that offers the best clue to the meaning of the word utopia.

When Professor Rogers asked me to visit her new garden, located in a
warehouse near the research campus, I thought little of it. She was
always up to something, but more often than not, it failed before
showing any results. When she pulled open the door, though - a wide
grin stretching beneath her spectacles - my jaw dropped.
Crystalline waterfalls danced beyond acres of lush foliage. Scores of
butterflies and hummingbirds danced and darted about the misty air.
Two months ago, this room held piles of rusty, obsolete mining
equipment, but now it contained a complete and utter utopia. In that
moment, I was truly sorry I ever doubted her.

A. In that moment, I was truly sorry
B. failed before showing any results.
C. Crystalline waterfalls danced beyond acres of lush foliage.
D. this room held piles of rusty obsolete