Final answer:
In this case, the driver of vehicle must slow down and proceed with caution, thus the correct option is b.
Explanation:
In this case, the driver of vehicle 'A' is responsible for the safety of the people around him and must take the correct measures to ensure no harm comes to them. The most appropriate action for the driver to take would be to slow down and proceed with caution. This is because, as the children are on the opposite side of the road, the driver cannot be sure that they will not cross the road without any warning. Therefore, slowing down and proceeding with caution is the safest option, as it allows the driver to better react to any potential danger.
Furthermore, it is important to note that the driver should not completely stop their vehicle, as this could cause a disruption to the flow of traffic. In addition, the driver should also check their mirrors regularly to ensure that they have a clear view of the surrounding area. This will allow the driver to anticipate any potential hazards and react accordingly.
In conclusion, the driver of vehicle 'A' should slow down and proceed with caution. This is the safest course of action for the driver to take, as it will allow them to better react to any sudden changes in the road. Additionally, the driver should also check their mirrors regularly to ensure that they have a clear view of the surrounding area.