Your network contains a DHCP server named DHCP1. You have a DHCP reservation for a computer named Computer1.You add a DNS server option to the reservation.You need to ensure that Computer1 immediately receives the new option.What should you do？（）

• A、Run ipconfig.exe /renew.
• B、Run ipconfig.exe /registerdns.
• C、On DHCP1, recreate the reservation.
• D、On DHCP1, delete the active lease for the reservation.