A security engineer identified a new server on the network and wants to scan the host to determine if it is running an approved version of Linux and a patched version of Apache. Which of the following commands will accomplish this task?

A. nmap f sV p80 192.168.1.20
B. nmap sS sL p80 192.168.1.20
C. nmap A T4 p80 192.168.1.20
D. nmap O v p80 192.168.1.20