I believe the correct answer is C. The amount of catalyst is the same at the end as at the beginning of the reaction. Catalysts can't be consumed by the reaction thus is not D.
Try to use this link https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4455825/
Answer:
sicl - Silty clay loam: 27 to 40 percent clay and less than 20 percent sand. sc - Sandy clay: 35 percent or more clay and 45 percent or more sand. sic - Silty clay: 40 percent or more clay and 40 percent or more silt. c - Clay: 40 percent or more clay, less than 45 percent sand, and less than 40 percent silt.
I hope that helps somewhat, sorry
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