Both Large and Small Wind Turbines Have Similar Installation,operating,and Maintenance

Multiple Choice

Both large and small wind turbines have similar installation,operating,and maintenance costs.However,a large turbine has four times the generating capacity but costs less than three times as much as a small turbine.The average cost of generating electricity with wind is

A) constant at each output.
B) increasing as output increases.
C) decreasing as output increases.
D) at first increasing and then decreasing as output rises.