$\backslash$table$[[$Unit Transportation Cost,Customer $1,$Customer $2,$Customer $3,$Available Quantity$],[$Factory $1,$$$400x_{11},$$$700x_{12},$$$600x_3,20],[$Factory $2,$$$350x_{21},$$$550x_{22},$$$500x_{23},12],[$Order Size,$8,10,14,]]$

In addition to the unit transportation cost, there exists a fixed cost $c_{ij}$ if any unit is delivered from factory $i$ to customer $j.$ We let $y_{ij}$ denote whether there is any unit delivered from $i$ to $j.$ What are the new constraints?

A$.x_{ij}{y}_{ij}$

B$.x_{ij}{y}_{ij}{y}_j=1,y_{ij}=0$

C$.x_{ij}100y_{ij}$

$x_{ij}100,x_{ij}0$

$y_i=1=>x_{ij}0$

$y_i=0=>x_i=0$