when automatic failover occurs?

Will I be alerted when automatic failover occurs?

A.
Only if SNS configured

B.
No

C.
Yes

D.
Only if Cloudwatch configured

Explanation:
http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_Events.html#USER_Events.Messages We
only get alert on failover if we configure the SNS Notification.