What could be done to ensure Switch3 will be the root?

Refer to the exhibit. A network administrator wants Switch3 to be the root bridge. What could be done to ensure Switch3 will be the root?

A.
Configure the IP address on Switch3 to be higher than the IP addresses of Switch1 and Switch2.

B.
Configure the priority value on Switch3 to be higher than the priority values of Switch 1 and Switch2.

C.
Configure the BID on Switch3 to be lower than the BIDs of Switch1 and Switch2.

D.
Configure the MAC address on Switch3 to be higher than the Switch1 and Switch2 MAC addresses.

E.
Configure a loopback interface on Switch3 with an IP address lower than any IP address on Switch1 and Switch2.