What industry did the refrigerated railcar impact the most

The question is asking us what industry did the refrigerated rail car impact the most. The first refrigerated rail cars were built in 1857 and they had holding areas for ice. The blocks of ice were loaded through ports in the roof of a car. Refrigerated cars were twice the cost of traditional rail cars. But on the other hand they allowed food to be transported to the greater distances and to stay fresh longer. Answer: Food industry.

Meat packing is the correct answer.