Which types of trailers are most likely to get stuck on railroad tracks? (Select three)

The correct answer highlights types of trailers that have design characteristics making them more susceptible to getting stuck on railroad tracks. Lowboy trailers, for example, are designed with a lower deck height to transport heavy equipment, which means they can have a wider footprint that may not clear railroad crossings easily. Possum-belly livestock trailers are similarly low to the ground, and their design can cause the trailer to get caught on uneven surfaces, including railroad tracks. The mention of single axle tractors pulling short trailers also comes into play because the shorter wheelbase may not distribute the weight effectively enough to navigate the tracks without risk of becoming stuck.

In contrast, other options present trailers that, while they might also face risks, do not align as closely with the specific design issues that contribute to getting stuck on railroad tracks. For example, double-deck trailers and enclosed trailers typically have a higher clearance, which helps them avoid obstruction. The combination of height and design in option B illustrates the risk factors associated with securing safety maneuvering over railroad crossings, making it the most appropriate selection for this question.