The first factories in the United States were built in rural areas. Later, however, factories began to be constructed in large cities. Which statement best explains how improved technology made this change possible? O A Improved warehouse construction enabled factory owners to store more of their products in the city. OB. The invention of the steam engine meant that factories no longer had to be located near streams. OC. Improved roads meant that factories no longer had to be located near stores that sold their products. D. The invention of the trolley car enabled people to travel from the suburbs to factory jobs in the city.​