Overnight, the DHCP Server Went Down

Multiple Choice

Overnight, the DHCP server went down. The server provides dynamic IP address for the computers in the office network (using the IPv4 standard) . You have the server backup but not all of the computers can connect to the network. What command/commands do you use to reconnect the computers to the server and obtain an IP address?

A) Ipconfig /refresh
B) Ipconfig /release and then ipconfig /renew
C) Ipconfig /release and then ipconfig /refresh
D) Ipconfig /all