Choose two.Which two statements are

多选题
Choose two.
Which two statements are true concerning logical and physical database structures?

A、 A segment might have only one extent.

B、 A segment's blocks can be of different sizes.

C、 Segments can span multiple tablespaces.

D、 All tablespaces may have one or more data files.

E、 A segment can span multiple data files in some tablespaces.

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