A sys admin is planning to subscribe to the RDS event notifications. For which of the below mentioned source
categories the subscription cannot be configured?

A.
DB security group

B.
DB snapshot

C.
DB options group

D.
DB parameter group

Explanation:
Amazon RDS uses the Amazon Simple Notification Service (SNS. to provide a notification when an Amazon
RDS event occurs. These events can be configured for source categories, such as DB instance, DB security
group, DB snapshot and DB parameter group.