Given these four Class B networks: 172.104.0.0, 172.105.0.0, 172.106.0.0, 172.107.0.0, what is the supernet (CIDR) address that summarizes these four Class B networks?
A. 172.104.0.0/12
B. 172.104.0.0/13
C. 172.104.0.0/14
D. 172.104.0.0/15
What is the supernet (CIDR) address that summarizes these four Class B networks?