A group of users is installing an application on a laptop computer and encounters a problem. No documentation was attached while downloading the application; only the installation file is available. They believe that they have done something wrong. What is the first thing that they should look for a possible solution to their problem?

a. comments
b. frequently asked questions (FAQ)
c. runbook
d. README

d. README

The first thing that the users should look for a possible solution to their problem is the "d. README" file. The README file typically contains important information about the installation process, any known issues, and instructions on how to troubleshoot common problems. Reading through the README file can provide valuable insights and solutions to the encountered problem.