You want to start a global service on your database. Which three conditions must be met?
A.
The database is open and registered with a global service manager.
B.
The service has been disabled on that database.
C.
The database role is different from the role attribute of the service.
D.
The replication lag on the database does not exceed the maximum value specified for the service.
E.
The service has reached its cardinality defined by the number of preferred databases.
F.
No other database in the pool is a better candidate for starting the service.
Explanation:
https://docs.oracle.com/database/121/GSMUG/cloud.htm#GSMUG694