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.
ip helper address 10.10.1.1 under interface FastEthernet0/0.100

B.
option 150 ip 10.10.1.1 under dhcp pool Phones

C.
default-router 10.100.1.1 under dhcp pool Phones

D.
subnet prefix-length 24 under dhcp pool Phones

E.
encapsulation dot1q 10 native under interface FastEthernet0/0.10