What is the function of "DTS User Guides"?

The function of "DTS User Guides" is to provide instructions and best practices for travelers using the DTS system. These guides are essential resources that help users navigate various features of the Defense Travel System, ensuring that travelers can effectively manage their itineraries, submit travel authorizations, and claim expenses. By outlining step-by-step processes and offering tips on how to utilize the system efficiently, the user guides play a crucial role in enhancing the overall user experience and ensuring compliance with travel regulations.

In contrast, while travel regulations and policies are important aspects of the overall travel process, they are typically found in separate official documents or communications rather than in user guides specifically. Emergency contact numbers, although vital for safety, are not the primary focus of the user guides either. Lastly, group travel arrangements are a specific scenario that may not be covered in the general user guides, which are more oriented towards individual travel needs. Thus, option A captures the central purpose of the DTS User Guides accurately.