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.