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多項選擇題

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);

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