Find the sensitivity V_o / σ , where σ is the stress in MPa, using the variables V_i, g, e, r, and r_g . Note that the final expression does not necessarily simplify.

A) V_i * ger* r_g / σ
B) V_i / g * e* r * σ * r_g
C) V_i * ge / σ *r* r_g
D) V_i * ger / σ * r_g