A sentence has been given in Active/Passive Voice. Out of the four given alternatives, select the one which best expresses the same sentence in Passive/Active Voice.
The highway transportation system has helped to reduce traffic deaths with its easy flow of traffic under rash driving rules and also it helped to country economically.
The price elasticity of supply measures how the responsiveness of the quantity demanded of a commodity to changes it its prices; defined as the percentage change in quantity demanded divided by the percentage change in price.