For a Poisson’s ratio of 0.5, the elastic strain ∆ in terms of Boussinesq settlement factor is __________

For a Poisson’s ratio of 0.5, the elastic strain ∆ in terms of Bo

1.	For a Poisson’s ratio of 0.5, the elastic strain ∆ in terms of Boussinesq settlement factor is __________
A.	\(∆=\frac{pa}{E} F_B\)
B.	\(∆=\frac{3pa^2}{2E} F_B\)
C.	\(∆=\frac{a^2}{2E} F_B\)
D.	\(∆=\frac{pa^2}{2E} F_B\)
Answer» B. \(∆=\frac{3pa^2}{2E} F_B\)