Which statements are true regarding the hierarchical query in Oracle Database 10g?

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Which statements are true regarding the hierarchical query in Oracle Database 10g? (Choose all that apply.)

A.
It is possible to retrieve data only in top-down hierarchy.

B.
It is possible to retrieve data in top-down or bottom-up hierarchy.

C.
It is possible to remove an entire branch from the output of the hierarchical query.

D.
You cannot specify conditions when you retrieve data by using a hierarchical query.

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