你正在读入一个名为 doc 的 XML 文档，其内容如下<img src="https://nimg.ppkao.com/2018-07/longzhengxuan/2018072710465191380.jpg?sign=e2c8d2a39869f6eebe8bcf69d7650478&t=62d40e02" />（）<br />

A、foreach (XmlNode node in nodes){ node.Attributes[0].Value = “NA”;}

B、foreach (XmlNode node in nodes){ node.Attributes[1].Value = “NA”;}

C、foreach (XmlNode node in nodes){XmlNode genre = node.SelectSingleNode(“/genre”); genre.Value = “NA”;}

D、foreach (XmlNode node in nodes){XmlNode genre = node.SelectSingleNode(“@genre”); genre.Value = “NA”;}

E、foreach (XmlNode node in nodes){XmlNode genre = node.SelectSingleNode(“genre”); genre.Value = “NA”;}