QUESTION $27$

Consider the following linear programming model and associated sensitivity report.

Max $2x+4Y+6Z$

Subject $to$

$Z0$

$x+Y+Z20$

$x,Y,Z0$

$12$

$13$

Constraints

$14$

$15$

$16$

$17$

SES $12$ LHS

By how much would the unit contribution of variable Z has tonincrease before it can take a positive value in the optimal solution?

A$.0$

B$.2$

C$.6$

D$.1E+30$

E$.$ None of the above