1 degree Clarke = 1 part of CaCO3 per _____________ parts of

1-degree-clarke-1-part-of-caco3-per-parts-of

1 degree Clarke = 1 part of CaCO3 per _____________ parts of water.
A. 10,000
B. 30,000
C. 50,000
D. 70,000
The correct choice is D. 70,000

1 degree Clarke = 1 part of CaCO3 per 70,000 parts of water. It is calculated mathematically.