Comprehensive and Detailed Step-by-Step Client-Side Debugging Context: Client-side scripts, such as Client Scripts or UI Policies, run in the browser. Debugging these scripts requires tools and methods that interact directly with the client-side environment. Valid Options for Debugging: g_form.addInfoMessage(): This method displays an informational message on the form, which is useful for providing immediate feedback to the user or debugging purposes. Example: g_form.addInfoMessage('This is a test message.'); jslog(): This method logs messages to the browser's JavaScript console, which is an essential tool for debugging client-side scripts. Example: jslog('Debugging message: Variable X = ' + x); Incorrect Options Explained: gs.addErrorMessage() (Option B): This is a server-side method and cannot be used in client-side scripts. gs.log() (Option D): Similarly, this is a server-side method and is not applicable for debugging client-side scripts. Reference: ServiceNow Developer Documentation on Client Scripts.