A threat actor has decided to get revenge on a company that overcharged him for a product he says didn't work. Upon completing a scan of their public$-$facing network, he finds a list of the services running on the server and decides to look for vulnerabilities in each of the services. He gets a copy of one of the programs he detected, but needs to examine the source code to look for unknown vulnerabilities. Which of the following might allow him to see the source code behind the program?