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A web-startup runs its very successful social news application on Amazon EC2 with an Elastic
Load Balancer, an Auto-Scaling group of Java/Tomcat application-servers, and DynamoDB
as data store. The main web-application best runs on m2 x large instances since it is highly
memory-bound Each new deployment requires semi-automated creation and testing of a new
AMI for the application servers which takes quite a while ana is therefore only done once per
week. Recently, a new chat feature has been implemented in nodejs and wails to be
integrated in the architecture. First tests show that the new component is CPU bound

Because the company has some experience with using Chef, they decided to streamline the
deployment process and use AWS Ops Works as an application life cycle tool to simplify
management of the application and reduce the deployment cycles.
What configuration in AWS Ops Works is necessary to integrate the new chat module in the
most cost-efficient and flexible way?

A.
Create one AWS Ops Works stack, create one AWS Ops Works layer, create one custom recipe

B.
Create one AWS Ops Works stack create two AWS Ops Works layers create one custom recipe

C.
Create two AWS Ops Works stacks create two AWS Ops Works layers create one custom recipe

D.
Create two AWS Ops Works stacks create two AWS Ops Works layers create two custom recipe

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