In the long run, a firm might experience rising per-unit cost due to:

One group of people uses New York City subways only during rush hour to travel to and from work. Another group uses them only in midday for leisure activity. If New York City wants to increase transit fares with the smallest possible reduction in revenue, for which group should it increase the fare?

a. The rush-hour group because its demand for subway service is more elastic than that of the midday group. b. The rush-hour group because its demand for subway service is less elastic than that of the midday group. c. The midday group because its demand for subway service is more elastic than that of the rush-hour group. d. The midday group because its demand for subway service is less elastic than that of the rush-hour group. e. It doesn't matter because both groups have the same elasticity of demand.

According to the circular-flow diagram, if Suzy is a worker who delivers flowers for Happy Day Flower Company, she participates

a. in the markets for factors of production exchanging labor for income. b. in the markets for factors of production exchanging flowers for revenue. c. in the markets for goods and services exchanging flowers for wages, rent, and profit. d. in the markets for goods and services exchanging labor for income.