A company recently migrated its web application to AWS by rehosting the application on Amazon EC2 instances in a single AWS Region. The company wants to redesign its application architecture to be highly available and fault tolerant. Traffic must reach all running EC2 instances randomly.

Which combination of steps should the company take to meet these requirements? (Choose two.)

A. Create an Amazon Route 53 failover routing policy.

B. Create an Amazon Route 53 weighted routing policy.

C. Create an Amazon Route 53 multivalue answer routing policy.

D. Launch three EC2 instances: two instances in one Availability Zone and one instance in another Availability Zone.

E. Launch four EC2 instances: two instances in one Availability Zone and two instances in another Availability Zone.

Simple Routing

Use a simple routing policy for traffic that requires standard DNS records only and doesn't require special options such as weighted or latency routing. You can't use multiple records of the same name and type with simple routing. However, a single record can contain multiple values (such as IP addresses).

Use a simple routing policy to achieve any of the following.

• Create only one basic record of each name and type.
• Route traffic to a single resource (such as your website's web server).
• Route traffic to a single record with multiple values (such as an A record that specifies multiple IP addresses).Note: Route 53 returns the values in a random order to the client, and you can't weight or determine the order with a simple routing policy.

Multivalue Answer Routing

Use a multivalue answer routing policy to achieve any of the following.

• Create more than one record of the same name and type.
• Distribute DNS responses across multiple resources.
• Return multiple values for a DNS query and route traffic to multiple IP addresses.
• Route traffic to multiple resources.