When adding Address Book entry in a NetScreen for a range of addresses, which mask can be used?

A.
0.0.0.255

B.
192.168.0.0

C.
255.255.255.224

D.
255.255.255.255

Explanation:
The NetScreen ScreenOS classifies the addresses of all other devices by location and netmask. Each zone
possesses its own list of addresses and address groups. Individual hosts have only a single IP address defined and therefore, must have a netmask setting of 255.255.255.255 (which masks out all but this host).
Subnets have an IP address and a netmask (for example, 255.255.255.0 or 255.255.0.0). Before you can configure policies to permit, deny, or tunnel traffic to and from individual hosts and subnets, you must make entries for them in NetScreen address lists, which are organized by zones.
You do not have to make address entries for Any.. This term automatically applies to all devices physically
located within their respective zones.