Rewrite the System of Inequalities, Adding Slack Variables or Subtracting $\mathrm{x}_{1}+\mathrm{x}_{2} \leq 20$

Rewrite the system of inequalities, adding slack variables or subtracting surplus variables as needed.
- $\mathrm{x}_{1}+\mathrm{x}_{2} \leq 20$
$2 \mathrm{x}_{1}+4 \mathrm{x}_{2} \geq 24$

A) $x_{1}+x_{2}-s_{1}=20$
$2 x_{1}+4 x_{2}+s_{2}=24$
B) $x_{1}+x_{2}-s_{1}=20$
$2 \mathrm{x}_{1}+4 \mathrm{x}_{2}-\mathrm{s}_{2}=24$
C) $\mathrm{x}_{1}+\mathrm{x}_{2}+\mathrm{s}_{1}=20$
$2 \mathrm{x}_{1}+4 \mathrm{x}_{2}+\mathrm{s}_{2}=24$
D) $\mathrm{x}_{1}+\mathrm{x}_{2}+\mathrm{s}_{1}=20$
$2 \mathrm{x}_{1}+4 \mathrm{x}_{2}-\mathrm{s}_{2}=24$