Select the reaction(s) that would result in the formation of 2-bromopropane as major product.
$\text{ (I) }{\mathrm{CH}}_3\mathrm{CH}={\mathrm{CH}}_2+\mathrm{HBr}\stackrel{\text{ peroxide }}{⟶}$
$\text{ (II) }{\mathrm{CH}}_3\mathrm{CH}={\mathrm{CH}}_2+\mathrm{HBr}\stackrel{{\mathrm{CCl}}_4}{⟶}$
$\text{ (III) }{\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_3+{\mathrm{Br}}_2\stackrel{\mathrm{hv}}{⟶}$
$\text{ (IV) }{\mathrm{CH}}_3\mathrm{CH}={\mathrm{CH}}_2+{\mathrm{Br}}_2\stackrel{{\mathrm{CCl}}_4}{⟶}$