Why is it important for a security tester to be able to use Nmap? a$.$Nmap has become one of the most popular port scanners and adds new features constantly, such as OS detection and fast multiple$-$probe ping scanning. b$.$Nmap has a GUl front end called Zenmap that makes working with complex options easier. c$.$Nmap has been enhanced over the years because, like many other security tools, it's open$-$source; if bugs are found, users can offer suggestions for correcting them. d$.$Nmap is important for a Security tester to be able to use for all of the reasons listed within the choices