Which of the following indicates the correct IP address range?

A network administrator has been given a network of 172.16.85.0/21 and wants to know the usable range of IP addresses on that subnet.

Which of the following indicates the correct IP address range?
A . 172.16.80.0-172.16.85.254
B . 172.16.80.0-172.16.88.255
C . 172.16.80.1-172.16.87.254
D . 172.16.80.1-172.16.85.255

Answer: C