If change in voids ratio is 0.18 and change in effective pressure is 100KN/m², then the coefficient of compressibility is ______

If change in voids ratio is 0.18 and change in effective pressure is 1

1.	If change in voids ratio is 0.18 and change in effective pressure is 100KN/m², then the coefficient of compressibility is ______
A.	2.5×10¯³ m²/kN
B.	2×10¯³ m²/kN
C.	9×10¯³ m²/kN
D.	9.5×10¯³ m²/kN
Answer» C. 9×10¯³ m²/kN