Briefing Amazon Knowledge

which should be implemented in multiple Availability Zones for high availability solutions?

When using the following AWS services, which should be implemented in multiple Availability Zones for high
availability solutions? Choose 2 answers

A.
Amazon DynamoDB

B.
Amazon Elastic Compute Cloud (EC2)

C.
Amazon Elastic Load Balancing

D.
Amazon Simple Notification Service (SNS)

E.
Amazon Simple Storage Service (S3)