Your company has a main office and a branch office. The main office has a domain controller named DC1 that hosts a DNS primary zone. The branch office has a DNS server named SRV1 that hosts a DNS secondary zone. All client computers are configured to use their local server for DNS resolution. You change the IP address of an exisiting server named SRV2 in the main office. You need to ensure SRV1 reflects the change immediately. What should you do？（） 

• A、 Restart the DNS Server service on DC1
• B、 Run the dnscmd command by using the /zonerefresh option on DC1
• C、 Run the dnscmd command by using the /zonerefresh option on SRV1
• D、 Set the refresh interval to 10minutes on the Start Of Authority （SOA） record.