【单选题】
A http://localhost/script?’:EXEC+master..XP_cmdshell+’dir’:--
B http://localhost/script?1’:EXEC+master..XP_cmdshell+’dir’:--
C http://localhost/script?0’:EXEC+master..XP_cmdshell+’dir’:--
D http://localhost/script?1’:EXEC+master..XP_cmdshell+’dir’--
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