A student walks 80 m east, then 30 m west. Which pair gives the distance travelled and the displacement from the starting point?
Distance 50 m50\ \mathrm{m}50 m; displacement 110 m110\ \mathrm{m}110 m east
Distance 110 m110\ \mathrm{m}110 m; displacement 50 m50\ \mathrm{m}50 m east
Distance 110 m110\ \mathrm{m}110 m; displacement 50 m50\ \mathrm{m}50 m west
Distance 50 m50\ \mathrm{m}50 m; displacement 110 m110\ \mathrm{m}110 m west