In Modeling a Shopping Mall Construction Problem, There Are Four $X_{1}, X_{2}, X_{3}, X_{4}$

Multiple Choice

In modeling a shopping mall construction problem, there are four potential locations giving rise to four 0-1 decision variables denoted as $X_{1}, X_{2}, X_{3}, X_{4}$ , which take a value of 1 if a mall is constructed and 0 otherwise. Identify the correct set of constraint/s to satisfy the following condition/s: if a mall is constructed in location 2, then a mall should be constructed in location 4

A) $\mathrm{X}_{2}-\mathrm{X}_{4} \leq$ 0.
B) $-X_{2}+X_{4} \geq$ 0.
C) $\mathrm{X}_{2}-\mathrm{X}_{4} \leq$ 0
D) $-\mathrm{X}_{2}+\mathrm{X}_{4} \leq$ 0