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Pesticide units should necessarily be on a large scale to make them economically viable.

  • A.The inference is definitely true
  • B.The inference is probably true though not definitely true
  • C.The inference is probably false
  • D.The inference is definitely false

Answer: B

The key treats this inference as probably true.

The paragraph lists small scale of operation among the heavy constraints of the smaller units, and says their margins are very low, which suggests that scale matters to viability. It does not say that large scale is necessary, so the inference is not definitely true. It is not contradicted either, so it is probably true.

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