Final answer:
The M969A1 tanker trailer weighs 15,000 pounds empty and 48,950 pounds full, representing its unladen and laden weights respectively.
Step-by-step explanation:
The M969A1 is a tanker trailer used for transporting fuels. When referring to the weight of the M969A1, it is important to differentiate between its weight when it is empty (unladen) and when it is full (laden). Based on the options provided, the correct weights for the M969A1 are 15,000 pounds empty and 48,950 pounds full. These weights account for the dry weight of the trailer without any cargo and its maximum carrying capacity when laden with fuel, respectively.