PL-300 Question 58 - Rethink about the right answer

The question says "You have a Power BI imported dataset" so it is explicitly stated that connection mode is Import not DirectQuery.
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Microsoft document says that "Assume referential integrity is only available for DirectQuery or Data Lake models". So, the first answer cannot be "Assume Referential Integrity". So, it should be Cross filter direction. We need to change it to single. The second one is correct. It is Start schema.