Explanation:
A and C already occur with NOMOUNT option.B also occurs with the MOUNT option. With this option, the control file is read (!) to obtain the names and status of the datafiles and the redo log files.
Reference:
OCP Oracle 9i Database: Fundamentals I, p. 56.

Incorrect Answers: D, E: datafiles and redo log files are opened (and therefore checked) with the OPEN option.

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