Considering the following excel sensitivity report:

Variable Cells

$\backslash$table$[[$Cell$,$Name,$\backslash$table$[[$Final$],[$Value$]],\backslash$table$[[$Reduced$],[$Cost$]],\backslash$table$[[$Objective$],[$Coefficient$]],\backslash$table$[[$Allowable$],[$Increase$]],\backslash$table$[[$Allowable$],[$Decrease$]]],[$SBS$12$ Product $1=,0,-1,10,1,1E+30,],[$SB$$13$ Product $2=,30\mathrm{.}64516129,0,12,46\mathrm{.}5,3\mathrm{.}1,],[$SBS$14$ Product $=,0,-1,11,1,1E+30,],[$SBS$15$ Product $4=,12\mathrm{.}09677419,0,13,6\mathrm{.}2,1\mathrm{.}291666667,]]$

Constraints

$\backslash$table$[[$Cell$,$Name,$\backslash$table$[[$Final$],[$Value$]],\backslash$table$[[$Shadow$],[$Price$]],\backslash$table$[[$Constraint$],[$R$.$H$.$ Side$]],\backslash$table$[[$Allowable$],[$Increase$]],\backslash$table$[[$Allowable$],[$Decrease$]]],[$SHS$6,$Process $1($hrs$)$ Usage,$225\mathrm{.}8064516,0,600,1E+30,374\mathrm{.}1935484],[$SHS$7,$Process $2($hrs$)$ Usage,$268\mathrm{.}5483871,0,500,1E+30,231\mathrm{.}4516129],[$SHS$8,$Process $3($hrs$)$ Usage,$300,0\mathrm{.}5,300,150,237\mathrm{.}5],[$SHS$9,$Process $4($hrs$)$ Usage,$250,1\mathrm{.}5,250,281\mathrm{.}372549,83\mathrm{.}33333333]]$

Which one of the following values of the second objective function coefficient $(c_2)$ would generate a different optimal solution $($remember: all of the other variables remain the same$)?$

$8$

$9$

$13$

$14$

None of the above