An organization is concerned that its hosted web servers are not running the most updated version of the software. Which of the following would work BEST to help identify potential vulnerabilities? 

Answer options:

A. hping3 "S comptia.org "p 80
B. nc "l "v comptia.org "p 80
C. nmap comptia.org "p 80 "sV
D. nslookup "port=80 comptia.org

C