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When the minimum number of instances of an entity is one, you know which of the following?

  • A.Mandatory one
  • B.Optional one
  • C.Mandatory many
  • D.Cannot tell

Answer: D

Correct answer: Cannot tell

A minimum of one establishes that participation is mandatory but says nothing about how many are permitted. Mandatory one and mandatory many both have a minimum of one, and only the maximum distinguishes them - which is why both figures must always be read together.

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