问题描述：
[单选]
Question #168【EN】A company"s web application currently has tight dependencies on underlying components， so when one component fails the entire web application fails． Applying which AWS Cloud design principle will address the current design issue？【CN】一家公司的web应用程序目前对底层组件有着紧密的依赖性，因此当一个组件出现故障时，整个web应用程序都会出现故障。应用哪种AWS云设计原则将解决当前的设计问题？
A．[EN]Implementing elasticity, enabling the application to scale up or scale down as demand changes.[CN]实现弹性，使应用程序能够随着需求的变化而放大或缩小。
B．[EN]Enabling several EC2 instances to run in parallel to achieve better performance.[CN]使多个EC2实例并行运行以获得更好的性能。
C．[EN]Focusing on decoupling components by isolating them and ensuring individual components can function when other components fail.[CN]通过隔离组件并确保单个组件在其他组件发生故障时能够正常工作，重点关注去耦组件。
D．[EN]Doubling EC2 computing resources to increase system fault tolerance.[CN]加倍EC2计算资源以提高系统容错能力。
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上一篇：Question #169【EN】How can a customer increase security to AWS account logons？ （Choose two．）【CN】客户如何提高AWS帐户登录的安全性？（选择两个。）
下一篇：Question #167【EN】A director has been tasked with investigating hybrid cloud architecture． The company currently accesses AWS over the public internet． Which service will facilitate private hybrid connectivity？【CN】一位主管负责调查混合云架构。该公司目前通过公共互联网访问AWS。哪种服务将促进专用混合连接？
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