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Difficulty: MediumCompleting the Passage Logically

Agricultural firms operating large commercial orchards recently replaced periodic manual inspections by agronomists with autonomous drone swarms equipped with hyperspectral cameras to detect fungal infections. Although the drone swarms identify fungal outbreaks several days earlier than human agronomists can, farms employing the drones ultimately suffered higher seasonal crop losses from fungal disease. This unexpected result is largely explained by the fact that manual agronomists routinely pruned infected branches immediately upon detection during their walkthroughs, whereas drone detection relies on scheduled follow-up spraying teams, so...

Which of the following most logically completes the passage above?

  1. the delay between drone detection and the arrival of spraying teams allowed fungal spores to spread to adjacent healthy trees before any corrective action took place.Answer
  2. B
    the hyperspectral cameras on the autonomous drones required frequent technical recalibration, which increased the overall operational overhead of the commercial orchards.
  3. C
    human agronomists are significantly more accurate at identifying fungal infections than autonomous drone swarms equipped with hyperspectral imaging.
  4. D
    immediate pruning of infected branches by human agronomists is an intermediate operational step that must be confirmed by laboratory testing.
  5. E
    farms using autonomous drones saw a substantial increase in consumer demand for sustainably managed fruit products.

Answer

The passage is logically completed by explaining that the delay between drone detection and the deployment of spraying teams allowed fungal spores to spread to adjacent healthy trees before any corrective action took place.
The correct option provides the missing causal link that bridges the premise gap: manual inspectors contained the disease instantly via immediate pruning, whereas the delay inherent in scheduling spraying teams after drone detection allowed fungal spores to spread to nearby healthy trees before treatment occurred. This directly explains why earlier detection by drones still resulted in higher overall crop loss.

Step-by-Step Solution

1
Analyze the core paradox presented in the stimulus premises.
Drones detect infection earlier than humans, yet drone-monitored farms suffer higher total crop losses.
Completing the passage requires resolving why earlier detection failed to yield better crop protection.
2
Examine the differentiating factor provided right before the blank.
Human inspectors performed immediate physical removal (pruning) upon detection, whereas drones trigger delayed follow-up treatments (spraying teams).
The sentence ending in 'so...' must connect this operational contrast to the negative outcome.
3
Synthesize the contrast to deduce the logical conclusion.
The lapse of time between automated drone detection and actual treatment allows the disease to spread further than it did under immediate manual pruning.
This provides a complete, self-contained causal explanation without introducing extraneous assumptions.

Key Concept

Completing the Passage Logically
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Completing the Passage Logically

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