单项选择题
中国外汇交易中心显示的人民币对主要币种的汇率中间价如下表所示：
2020年1月2日相比，5月28日人民币对美元的变动情况是（ ）。
- A.贬值2.39%
B.升值2.39%
C.贬值6.63%
D.升值6.63%
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