Explanation

One hectare-centimeter (ha cm) of water equals 10,000 cubic meters. Since 1 cubic meter of water is 1 tonne and also 1,000 liters, this volume equals 10,000 tonnes (not 100 or 10) and 10,000,000 liters (not 100,000). However, in agricultural contexts, 1 ha cm is often approximated as 100 tonnes per hectare (since 10,000 m² * 0.01 m = 100 m³ = 100 tonnes) and 100,000 liters (since 100 m³ * 1,000 L/m³ = 100,000 L). Thus, both A and B are standard approximations used in this context.