单选题在DNS服务器中如何在zone文件中指定管理该zone的管理员邮箱为hostmaster@foo.com（）。A在注册该域时指定B将hostmaster@foo.com放入SOA记录的第二块空间内C在zone文件中创建MAILTOhostmaster@foo.com的记录D将hostmaster.foo.com放入SOA记录的第二块空间内
单选题
在DNS服务器中如何在zone文件中指定管理该zone的管理员邮箱为hostmaster@foo.com（）。
A
在注册该域时指定
B
将hostmaster@foo.com放入SOA记录的第二块空间内
C
在zone文件中创建MAILTOhostmaster@foo.com的记录
D
将hostmaster.foo.com放入SOA记录的第二块空间内
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