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Second sourcing means

  • A.buying from two distributors rather than one
  • B.keeping a second batch of parts in stock as a reserve
  • C.qualifying two separate assembly houses for the board
  • D.having an alternative part that can be fitted without redesign

Answer: D

The point is technical rather than commercial: a pin- and register-compatible part from another vendor, or another family, that the board and the firmware can accept. Two distributors selling the same single-sourced part gives no protection at all.

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