问题：

[单选]

View the Exhibit to examine the parameters set for your database instance.You execute the following command to perform I/O calibration after the declaration of bind variables in the session that are used in the command:

Which statement describes the consequence?（）

A . The command produces an error.
B . The calibration process runs successfully and populates all the bind variables.
C . The calibration process runs successfully but the latency time is not computed.
D . The calibration process runs successfully but only the latency time is computed.Only users with the SYSDBA privilege can run this procedure. Qualified users must also turn on timed_statistics, and ensure asynch_io is enabled for datafiles.