Which government travel card is commonly used with DTS?

The Government Travel Charge Card (GTCC) is the correct answer because it is specifically designed for official government travel expenses and is the card most commonly used in conjunction with the Defense Travel System (DTS). The GTCC allows travelers to pay for various travel-related costs, such as transportation, lodging, and meals, which helps manage and streamline the expense reporting process within DTS. This integration simplifies the reimbursement process for service members and civilian employees, as it ensures expenses are properly tracked and authorized.

In contrast, the other options do not align with the primary purpose of travel expenses within the context of government travel. The Commercial Travel Card (CTC) is typically used for commercial travel purposes but is not specifically tied to the government's travel processing system. The Military Travel Card (MTC) may sound relevant but is not a recognized term used within the DTS framework. The Airline Credit Card (ACC) is specific to airline rewards and frequent flyer programs, not directly related to government travel funding or reimbursement systems. Therefore, the GTCC is the key tool that supports government travelers utilizing the DTS.