What color and how many "Children on board" signs are on a school bus?

The correct answer indicates that there are two black "Children on board" signs located on both sides of the school bus. These signs are essential for notifying other road users that there are children present in the vicinity of the bus, which is crucial for ensuring safety during the loading and unloading of students. The use of black coloring for these signs helps them stand out against the backdrop of the bus, making it easier for drivers to notice and understand that they need to be particularly cautious.

School buses are designed with safety in mind, and the placement and color of the signs play a vital role in reducing the risk of accidents involving children. While some other options mention different numbers or colors of signs, their configurations do not adhere to the standard regulations. Ensuring that the children’s safety is prioritized is why the correct answer is critical for drivers and those on the road when approaching a school bus.