When structure of two soils is compared, it will be better in that soil whose cumulative mean weight diameter (CMWD) is:

Correct option is D

Cumulative Mean Weight Diameter (CMWD) is an indicator of aggregate stability in soils. Higher CMWD means more stable and larger aggregates, which is desirable for better soil structure, aeration, infiltration, and root growth.
Thus, higher CMWD reflects better soil structural quality.