Which two commands need to be added to this configuration to allow IP phones in subnet 10.100.1.0 to register with Cisco CallManager Express at address 10.10.1.1?

Exhibit:

Which two commands need to be added to this configuration to allow IP phones in subnet 10.100.1.0 to register with Cisco CallManager Express at address 10.10.1.1? (Choose two.)

A.
default-router 10.100.1.1 under dhcp pool phones

B.
encapsulation dot1q 10 native under interface FastEthernent0/0.10

C.
subnet prefix-length 24 under dhcp pool phones

D.
ip helper address 10.10.1.1 under interface FastEthernet0/0.100

E.
option 150 ip 10.10.1.1 under dhcp pool phones