Assuming a subnet mask of 255.255.248.0, three of the following addresses are valid host addresses. Which are these addresses? (Choose three.)

For the subnet 172.16.8.0/21, the valid host range is 172.16.8.1 to 172.16.15.254, making 172.16.9.0 a valid host address.

The address 172.16.8.0 with a /21 subnet mask (255.255.248.0) is the network address for its respective subnet and thus cannot be assigned to a host.

For the subnet 172.16.24.0/21, the valid host range is 172.16.24.1 to 172.16.31.254, making 172.16.31.0 a valid host address.

For the subnet 172.16.16.0/21, the valid host range is 172.16.16.1 to 172.16.23.254, making 172.16.20.0 a valid host address.