Your Web site processes book orders. One of the application methods contains the following code segment. XmlDocument doc = newXmlDocument（ ）; doc.LoadXml(“10”+” Dictionary”); You need to remove the discount element from XmlDocument. Which two code segments can you use to achieve this goal? (Each correct answer presents a complete solution. （）A、XmlNode root = doc.DocumentElement;root.RemoveChild(root.FirstChild);B、XmlNode root = dec.DocumentElement;root.RemoveChild(root.SelectSingleNode(“discount”));C、doc.RemoveChild(doc.FirstChild);D、doc.DocumentElement.RemoveChild(doc.FirstChild);
Your Web site processes book orders. One of the application methods contains the following code segment. XmlDocument doc = newXmlDocument（ ）; doc.LoadXml(“
- A、XmlNode root = doc.DocumentElement;root.RemoveChild(root.FirstChild);
- B、XmlNode root = dec.DocumentElement;root.RemoveChild(root.SelectSingleNode(“discount”));
- C、doc.RemoveChild(doc.FirstChild);
- D、doc.DocumentElement.RemoveChild(doc.FirstChild);
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