[单选]
You find this query being used in your Oracle 12c database:
Which method a used by the optimizer to limit the rows being returned?（）

A . A filter is added to the table query dynamically using ROWNUM to limit the rows to 20 percent of the total rows
B . All the rows are returned to the client or middle tier but only the first 20 percent are returned to the screen or the application.
C . A view is created during execution and a filter on the view limits the rows to 20 percent of the total rows.
D . A TOP-N query is created to limit the rows to 20 percent of the total row

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You find this query being used in your Oracle 12c database:
Which method a used by the optimizer to limit the rows being returned?（）

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[单选] You find this query being used in your Oracle 12c database: Which method a used by the optimizer to limit the rows being returned?（）

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[单选]
You find this query being used in your Oracle 12c database:
Which method a used by the optimizer to limit the rows being returned?（）