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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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