【单选题】
A 检查是否设置记住历史密码次数select limit from dba_profiles t where resource_name = ''PASSWORD_REUSE_MAX''，回显中default值变成5
B 检查是否配置最大认证失败次数select limit from dba_profiles t where resource_name = ''FAILED_LOGIN_ATTEMPTS''，回显中default值变成6
C 检查帐户口令生存周期命令：select limit from dba_profiles t where resource_name = ''PASSWORD_LIFE_TIME''，回显值大于90
D 检查口令强度设置select count(*) from dba_profiles where resource_name = ''PASSWORD_VERIFY_FUNCTION'' and limit = ''NULL''，回显中COUNT值为0
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