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單項(xiàng)選擇題

An administrator is planning an upgrade of a major software package on an application server.The software has been identified， the project approved and the upgrade purchased. Which of the following steps should the administrator take NEXT？（）

A.Create a test environment for the new version.
B.Determine system requirements for the upgrade.
C.Request bids from other competing vendors in the product space.
D.Document the upgrade.

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