Explanation:
Although cluster tables initially might seem like the right Ans, notice that the Question: states that this table experiences frequent data change activity – the bane of a cluster table’s existence. Thus, you must use standard tables, and this choice is correct. Nothing in the Question: indicates that you need the functionality offered by temporary tables. Finally, nothing in the Question: indicates the need for an IOT.
Reference:
Oracle 9i: Administrator’s Guide
Oracle 9i: Concepts

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