What are the correct commands that configure the DHCP lease from pool DC1 to never expire?

What are the correct commands that configure the DHCP lease from pool DC1 to never expire?
A . OS10(config)# ip dhcp server OS10(config-dhcp)# pool DC1 accounting OS10(config-dhcp-DC1)#no lease expire
B . OS10(config)# ip dhcp server OS10(config-dhcp)# pool DC1 accounting OS10(config-dhcp-DC1)# no expire
C . OS10(config)#dhcp server OS10(config-dhcp)# pool DC1 OS10(config-dhcp-DC1)# no lease expire
D . OS10(config)# ip dhcp server OS10(config-dhcp)# pool DC1 OS10(config-dhcp-DC1)#lease infinite

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Answer: D