Given the CIDR address range of 200.165.160.0 to 200.165.191.255, what is the CIDR block? A. 200.165.160.0/17 B. 200.165.160.0/18 C. 200.165.160.0/19 D. 200.165.160.0/20 E. 200.165.160.0/21