As part of your Oracle Database 12c post-installation tasks, you run these commands:
Cd $ORACLE_HOME/bin
srvctl stop database -d myDb
chopt enable dm
srvctl start database -d myDb
What does this do?
A.
It enables the Oracle Data Mining option in your Oracle binary files.
B.
It creates the Fast Recovery Area disk group.
C.
It generates Client Static Library.
D.
It configures one of the Oracle user accounts.
E.
It configures Oracle Net Services.
F.
It configures Oracle Messaging Gateway.
Explanation:
http://docs.oracle.com/cd/E16655_01/install.121/e17889/postinst.htm#RILIN1049 (see 4.4)
Letter A is a correct answer
see:
http://ronr.blogspot.com.br/2014/05/enabling-and-disabling-options-in.html
is correct answer “A”. here information
https://docs.oracle.com/database/121/LADBI/post_inst_task.htm#LADBI5600
8.3.6 Enabling and Disabling Database Options
Example 8-1 Complete Example of Running the Chopt Tool
To enable the Oracle Data Mining option in your Oracle binary files, use the following command:
cd $ORACLE_HOME/bin
srvctl stop database -d myDb
chopt enable dm
srvctl start database -d myDb