Which of the Following Statements About Indexes Is Incorrect

Multiple Choice

Which of the following statements about indexes is incorrect?

A) An index is a database object that stores a frequently referenced value and the row id (ROWID) of the record containing that value.
B) An index is only beneficial if a large percentage of a table is expected to be returned in query results.
C) An index is used to speed up the process of searching for specific data.
D) An index is updated automatically every time a DML operation is performed on the underlying table, which can slow down execution of the DML operation.