下列四个选项中都是合法的转义字符的( )
(A)\''__________ '\\'__________'\n'
(B)'\'__________'\017'__________'\"'
(C)\018'__________'\f'__________'xab'
(D)\\0'__________'\101'__________'x1f'
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(A)\''__________ '\\'__________'\n'
(B)'\'__________'\017'__________'\"'
(C)\018'__________'\f'__________'xab'
(D)\\0'__________'\101'__________'x1f'