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Arrange the causal chain by which a weight saving reduces cost:

1. Empty weight is reduced

2. Manufacturing hours and fuel burn both fall

3. Production cost and direct operating cost both fall

4. Life cycle cost falls

Select the correct sequence.

  • A.2, 3, 1, 4
  • B.1, 2, 3, 4
  • C.2, 1, 3, 4
  • D.1, 3, 2, 4

Answer: B

The saving works through two separate routes at once, which is why weight discipline is worth so much more than either effect alone would suggest. The chain runs outward from a single design decision to the whole life cycle cost.

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