The "Main.

When a process is executed from the Start Job window in UiPath Orchestrator, the runtime value of an "In" argument in the "Main.xaml" file will be the value provided in Orchestrator if specified. If no value is provided in Orchestrator for this argument, then the default value specified in the "Main.xaml" file will be used, in this case, "String.Empty". Therefore, option C is correct. Arguments can be passed to the "Main.xaml" file from Orchestrator, and there is a mechanism to handle default values for arguments in case they are not provided at runtime.