【单项选择题】
An administrator is looking to apply a new service pack for an OS on several systems that run business critical applications for a large international finance corporation. <br /> Which of the following should the administrator do FIRST？（）<p> An administrator is looking to apply a new service pack for an OS on several systems that run business critical applications for a large international finance corporation. <br /> Which of the following should the administrator do FIRST？（）</p>
A、A. Deploy the service pack to a single department within the corporation.
B、B. Upgrade the system with requirements for that service pack.
C、C. Deploy the service pack to a non-critical application server.
D、D. Submit a change control for the service pack deployment.
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