Which two statements are true about starting and stopping all instances of a RAC database simultaneously with a single command?

Which two statements are true about starting and stopping all instances of a RAC database
simultaneously with a single command?

A.
The user must be SYSDBA.

B.
The user must be a member of the OSDBA group.

C.
The user can use SQL* Plus from local node.

D.
The user can use SRVCTL.

Explanation:
* Connecting as SYSOPER or SYSDBA enables you to perform privileged operations, such as
instance startup and shutdown.
* When you use SRVCTL to perform configuration operations on your cluster, SRVCTL stores
configuration data in the Oracle Cluster Registry (OCR). SRVCTL performs other operations, such
as starting and stopping instances, by calling SQL*Plus on each node.
Reference: Overview of Administering Oracle Real Application Clusters with SQL*Plus