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The requirements for a web application state that it must be architected for high availability. The web application consists of front-end web server and back-end
database server components respectively. Which of the following describes a solution that meets this requirement, while minimizing costs?

A. One front-end web server and two clustered back-end database servers

B. Two front-end web servers and two back-end database servers

C. Two front-end web servers and one back-end database server

D. Two load-balanced front-end web servers and two clustered back-end database servers

Explanation:

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