In a consolidation test, when the load is changed from 50KN/m2 to 100 KN/m2, then the void ratio changes from 0.80 to 0.60. The coefficient of compressibility will be

In a consolidation test, when the load is changed from 50KN/m²to 100 KN/m², then the void ratio changes from 0.80 to 0.60. The coefficient of compressibility will be

a) 0.003 m²/KN

b) 0.004 m²/KN

c) 0.002 m²/KN

d) 0.001 m²/KN