Which statement is true about the Oracle software relea…

Which statement is true about the Oracle software releases that are currently supported in
a Database as a Service (DBaaS) instance in Oracle Public Cloud?

A.
All versions and releases of Oracle Database 12c are supported.

B.
All versions and releases of Oracle Database 11g are supported.

C.
Oracle Database 11g Release 2 is supported.

D.
Oracle Database 12c is supported but only for single containerdatabases.

Explanation:
11g Release 2 and 12c Release 1 (and 2) are supported.

http://www.oracle.com/webfolder/technetwork/tutorials/obe/cloud/dbaas/obe_d
baas_creating_an_instance/obe_dbaas_creating_an_instance.html
You get complaints from users of several different applications that performance has
degraded over time.
These applications run in this configuration:
A check of wait events for the sessions belonging to these applications shows that the
sessions are waiting longer and that there are more sessions from other applications in the
same database instance.