每题都有对应标记的A、B、C和D四个选项，请选择最佳选项并在答题卡2的相应字母中间划横线。

For each of them there are four choices marked A, B, C and D. You should decide on the best choice and mark the corresponding letter on Answer Sheet 2 with a single line through the centre.

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根据课文内容选择最佳选项。

Choose the best answer according to the text.

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数据中心知识作家约翰·莱夫写了一本白皮书，研究了选择恰当的欧洲数据中心战略的一些选项和最佳实践方案。

Data center Knowledge writer John Rath has created a white paper which looks at options and best practices for selecting the right European data center strategy.

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