thE puBliC trAnsport Commission's CommitmEnt to running our City's trAins AnD BusEs As ______ As possiBlE hAs rEDuCED Cost to thE tAxpAyEr By 5%.
A．EFFiCiEnt
B．EFFiCiEnCy
C．EFFiCiEntly
D．EFFiCiEnCiEs