下面哪个 test.com 域的部分SOA 记录是正确的？( )

A、test.com. IN SOA cent7. root. cent7.test.com (

B、test.com. IN SOA cent7.test.com root.cent7.test.com (

C、test.com. IN SOA cent7.test.com. root@cent7.test.com. (

D、test.com. IN