A student performed a fractional distillation of a mixture of two straight$-$chain hydrocarbons, $C_7{H}_{16}$ and $C_8{H}_{18}.$ Using four clean, dry flasks, the student collected the distillate over the volume ranges $($A$,$ B$,$ C$,$ and D$)$ shown in the graph above. Over what volume range should the student collect the distillate of the compound with the stronger intermolecular forces?

$($A$)A$

$($B$)B$

$($C$)C$

the part $in$ distillation

that evapurates then

condensares back

the part in distillation

$($D$)D$ condensaris buck

$19$