A penetration tester is examining a Class C network to identify active systems quickly. Which of the following commands should the penetration tester use?

`192.168.0.1/16` specifies a Class B network, which is much larger than the requested Class C network, leading to a much longer and broader scan.

The `nmap -sn` command performs a ping scan (host discovery) to quickly identify active hosts without performing a full port scan. The `192.168.0.1-254` range accurately specifies the common usable host IP addresses within a typical Class C network, ensuring all potential active systems are targeted.

`192.168.0.1.254` is not a valid IP address or range format for Nmap.

`nmap -sN` performs a Null scan, which is a type of port scan, not a host discovery ping scan. The `-sn` option is required for quick host discovery.