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单选题
Given: Which regular expression, inserted at line 12, correctly splits test into "Test A", "Test B", and "Test C"?（）
A
String regex=""；
B
String regex=" ."；
C
String regex=".*"；
D
String regex="//s"；
E
String regex="//.//s*"；
F
String regex="//w[/.]+"；
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