The following solid are compacted at the same compactive effort in the field. Which one of the following is the correct sequence in the increasing order of their maximum dry density?

• A. Silty clay – clay – sand – gravel sand clay mixture
• B. Sand – gravel sand clay mixture – silty clay – clay
• C. Clay – silty clay – sand – gravel sand clay mixture
• D. Sand – gravel sand clay mixture – clay – silty clay