Your Web site processes book orders. One of the application methods contains the following code segment.Dim doc As New XmlDocument()doc.LoadXml("10" 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.Dim doc As New XmlDocument()doc.LoadXml("10" &_"Dictionary")You need to remove the discount element from XmlDocument. Which two code segments can you use to achieve this goal? （）
A. Dim root As XmlNode = doc.DocumentElementroot.RemoveChild(root.FirstChild)
B. Dim root As XmlNode = doc.DocumentElementroot.RemoveChild(root.SelectSingleNode("discount"))
C. doc.RemoveChild(doc.FirstChild)
D. doc.DocumentElement.RemoveChild(doc.FirstChild)
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