Question

complete the story with the detail that most logically develops the narrative.
the other four - legged competitors assemble outside the fence as a thirsty border collie—smaller and likely smarter than betsy—trots out and dunks his head in a nearby water trough. as a third - generation show dog, betsy easily meets the breed standard, though everyone says that she isnt the sharpest canine in the bunch. suddenly, the announcer calls betsy into the arena. her trainer, shane, gives betsy an encouraging scratch behind the ears. the dog crosses a little moat of dirty water and walks to the center of the ring. she lowers her muzzle to focus on the flurry of flitting sheep, a crisp new clarity in her eyes.
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shane watches, a mix of pride and awe swelling in his chest. success, he thinks, is the best revenge.
the crowd begins to cheer wildly for betsy; many of them have seen her before and know that they are in for a great show.
the loudspeaker calls from above:
ext in the arena is betsy, a long - haired border collie, led by her trainer, shane.\
without hesitation, betsy zigzags across the dusty swath of land, circling the livestock—a gladiator in the arena.
before betsy begins, though, she looks cautiously at shane for what she has learned will be his expert guidance.

Explanation:

The narrative builds to Betsy focusing intently on the sheep, setting up her to act on them. The detail that shows her immediately herding the sheep (like a gladiator) logically connects her focused state to the trainer's pride and the "success" referenced next. The other options either repeat prior events, are out of sequence, or contradict her newfound clarity.

Answer:

Without hesitation, Betsy zigzags across the dusty swath of land, circling the livestock—a gladiator in the arena.