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Equal amounts of different types of soils J, K, L and M were put into four identical glass containers. Equal volumes of water were then added to each container. After all the air had escaped from the soil in each container, the levels of water in the containers were as shown in the diagram below.
Which one of the following conclusions about the soils is correct?
A. Soil L had more air spaces between its particles than soil K.
B. Soil M had the most air spaces between its particles.
C. Soil K had less air spaces between its particles than soil M.
D. Soil J had the least air spaces between particles.