单项选择题

A.AB.BC.CD.DYou are creating a Windows Forms applicatio……

You are creating a Windows Forms application by using the .NET Framework 3.5. You use LINQ expressions to read a list of customers from the following XML file.

You need to obtain a list of names of customers who are 21 years of age or older.
Which code segment should you use？（）

A.A
B.B
C.C
D.D

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