Refer to the exhibit.

All of the switches shown in the exhibit are ArubaOS switches.

Where should the network administrator configure an IP helper address of 10.1.1.10?

A. on VLAN 2 on Switch-1

B. on VLAN 2 on Switch-3
C. on VLAN 1 on Switch-1
D. on VLAN 1 on Switch-2