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Why does performance degrade when many UPDATE, INSERT, or DELETEstatements are issued on a table...

Why does performance degrade when many UPDATE, INSERT, or DELETEstatements are issued on a table that has an associated bitmap index?

A.

The DML operations re-create the bitmap index blocks.

B.

The bitmap index is rebuilt automatically after a DML operation.

C.

The smallest amount of a bitmap that can be locked is a bitmap segment.

D.

Additional time is taken to remove NULL values from the bitmap index alter a DML operation.

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