Question 1120Navigation General

The correct answer is B) the present reading of the pressure, combined with the changes in pressure observed in the recent past. The reason this is the correct answer is that the most important information to be obtained from a barometer is the current atmospheric pressure reading and how that reading has been changing over time. Variations in atmospheric pressure are closely tied to changes in weather patterns, so monitoring both the current pressure and recent trends in pressure can provide valuable insights about current and upcoming weather conditions. The other answer choices are incorrect because they focus on less relevant information, such as the last two digits of the pressure reading (A), weather indications on the dial (C), or the difference between two pressure readings (D), which does not directly indicate pressure trends.