Multiple choice

Which of these is NOT a valid list of standard types?

  1. Proprietary, Industry, Open

  2. Industry, De facto, Open

  3. De facto, Industry, Private

  4. Industry, proprietary, open, de facto
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Proprietary, Industry, Open, and De facto are standard types. 'Private' is not a standard type in this context.

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