Correct Answer: B,C
Explanation/Reference:
B: The Data Guard monitor process (DMON) is an Oracle background process that runs for every database instance that is managed by the broker. When you start the Data Guard broker, a DMON process is created.
C: The following list describes some of the operations the broker automates and simplifies:
* Invoking switchover or failover with a single command to initiate and control complex role changes across all databases in the configuration.
Etc.
Incorrect Answers:
E: Oracle Enterprise Manager works with the Data Guard monitor to automate and simplify the management of a Data Guard configuration including:
* Performance tools and graphs that help you monitor and tune redo transport services and log apply services.
References: https://docs.oracle.com/cd/B28359_01/server.111/b28295/concepts.htm