How many reflectors are required on vehicles?

The correct answer highlights that vehicles are generally required to have a minimum of two reflectors to ensure visibility and safety on the road, particularly when they are parked or stopped in areas with low light conditions. These reflectors play a crucial role in alerting other drivers to the presence of the vehicle, helping to reduce the likelihood of accidents.

Having two reflectors is considered sufficient to provide the necessary visibility from multiple angles, enhancing safety during nighttime or poor weather conditions. In many jurisdictions, including Texas, this requirement is based on vehicle safety standards aimed at protecting both the vehicle occupants and other road users.

The other options do not meet the standard for reflector visibility, as one would not provide adequate warning to other drivers, while three or four, although potentially beneficial, exceed the basic legal requirement for reflectors on vehicles without adding significant additional safety benefits compared to the required two.