Which three statements are true about inner and outer joins?

Which three statements are true about inner and outer joins? (Choose three.)
A. A full outer join must use Oracle syntax
B. An inner join returns matched rows
C. A left or right outer join returns only unmatched rows
D. A full outer join returns matched and unmatched rows
E. Outer joins can only be used between two per query
F. Outer joins can be used when there are multiple join conditions on two tables

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