Four different soils are classified as $\text{CH, ML, SP, and SW}$, as per the Unified Soil Classification System. Which one of the following options correctly represents their arrangement in the decreasing order of hydraulic conductivity?
- $\text{SW, SP, ML, CH}$
- $\text{CH, ML, SP, SW}$
- $\text{SP, SW, CH, ML}$
- $\text{ML, SP, CH, SW}$