Which of these statements is true regarding the taillight when carrying a passenger?

The statement that the taillight does not need adjusting when carrying a passenger is accurate. When a motorcycle is designed, it accounts for a specified weight limit including both the rider and any passengers. The taillight's position and brightness are calibrated for normal operation, and as long as the load stays within the manufacturer's specifications, there should be no need to adjust the taillight.

Adjustments are typically required for different accessories or modifications that might change weight or balance, but riding with a passenger doesn't inherently alter the function or effectiveness of the taillight. Other options may imply unnecessary steps or conditions that aren't relevant when simply carrying a passenger on a motorcycle. This understanding of motorcycle operation and safety is crucial for maintaining visibility and ensuring safe riding conditions.