When driving through a school zone, what should you observe?

Answer: B — Reduced speed limits

When driving through a school zone, you should observe reduced speed limits. This is because school zones typically have a higher volume of pedestrians, and it is important to drive at a slower speed to ensure the safety of children and other pedestrians. Option A is incorrect because while stop signs may be present in a school zone, they are not the only thing to observe. Option C is incorrect because pedestrians are typically present in a school zone, so observing their presence is important. Option D is incorrect because there may be signs present in a school zone, such as school zone signs, speed limit signs, or crossing signs. Therefore, all of these options are incorrect except for B, which is the correct answer.