Which gets the name of the parent directory file “file.txt”？（）
A . String name= File.getParentName（“file.txt”）；
B . String name= （new File（“file.txt”））.getParent（）；
C . String name = （new File（“file.txt”））.getParentName（）；
D . String name= （new File（“file.txt”））.getParentFile（）；
E . Directory dir=（new File （“file.txt”））.getParentDir（）； String name= dir.getName（）；
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