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Answers: One or more children and unhappiness about darkness.
The similarities that exist between the Māori myth and the Haida myth is unhappiness about darkness and one or more children.
What is a myth?
A myth is a statement that is not scientifically proven or not really exist, it is just fake news that people make to save something or himself or just for fun, and people believe these things.
Thus, the correct options are B and D.
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