In Modeling a Shopping Mall Construction Problem, There Are Four $\mathrm{X}_{1}, \mathrm{X}_{2}, \mathrm{X}_{3}, \mathrm{X}_{4}$

Multiple Choice

In modeling a shopping mall construction problem, there are four potential locations giving rise to four 0-1 decision variables, denoted as $\mathrm{X}_{1}, \mathrm{X}_{2}, \mathrm{X}_{3}, \mathrm{X}_{4}$ , 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: at least one mall may be constructed among locations 1 and 3

A) $\mathrm{X}_{1}+\mathrm{X}_{3} \leq$ 1
B) $\mathrm{X}_{1}+\mathrm{X}_{3} \geq$ 1
C) $X_{1}+X_{3}>$ 1
D) $X_{1}+X_{3}=$