In a linear programming problem, the objective function was specified as follows:

Z $=2$A $+4$B $+3$C

The optimal solution calls for A to equal $4,$ B to equal $6,$ and C to equal $3.$ It has also been determined that the coefficient associated with A can range from $1\mathrm{.}75$ to $2\mathrm{.}25$ without the optimal solution changing. This range is called A$\text{'}$s:

Multiple Choice

surplus.

range of optimality

shadow price

range of feasibility

slack.