Final answer:
In Texas, all active-duty military personnel, National Guard and Reserve members, and veterans with a valid driver's license are allowed to drive motor vehicles.
Step-by-step explanation:
You asked which military may drive a motor vehicle in Texas. The correct answer to this question is D) All of the above. This means that all active-duty military personnel, National Guard and Reserve members, and veterans with a valid driver's license are legally allowed to drive motor vehicles in Texas, provided they comply with state regulations regarding licensing and vehicle operation.