A geography question about weather systems

1. Answers B and D are obviously incorrect, so they should be eliminated first.

2. The altitude map on the right side of answer A shows that the pressure altitudes at locations 5, 6, and 7 exceed 10 kilometers. From common geographical knowledge, we know that the thickness of the troposphere in mid-latitudes is about 10 kilometers. Also ∵ this area is in the middle latitudes (near the British Isles), ∴ it is unlikely that there is a troposphere exceeding 10 kilometers in this area. So answer A is eliminated. Only answer C is more in line with the actual situation.

3. From the question, we can see that the distance between the isobars from 3 to 6 is uniform, indicating that the air pressure changes evenly. However, the distance between the isobars beyond point 6 and the isobars at point 6 has obviously increased. Obviously, there will be a relatively large upward slope here, and point 6 should be an inflection point.

As for answer A, the pressure changes are obvious at points 2-4, the pressure changes slightly slower at points 5-6, and point 4 is an inflection point. The pressure changes at 3, 4, 5, and 6 in answer C are uniform, with an inflection point at 6. Obviously only answer C meets the analysis result that there should be an inflection point in the above 6 places, so answer C is chosen.