A town council made estimates of the costs and benefits of running a bus service in 2010 and 2011. These are shown in the table. What conclusion can be drawn from the table?
- ABetween 2010 and 2011, social costs fell and social benefits rose.
- BBetween 2010 and 2011, social costs rose and social benefits fell.
- CIn both years, positive externalities exceeded negative externalities.
- DIn both years, social costs equalled social benefits.