As urban populations continue to grow, so do the number of citizens who burn coal for fuel. Which detail would provide factual support for this sentence?

A) data about pollution caused by motorized vehicles
B) data about China’s economy in the global marketplace
C) data about population growth in China’s largest city
D) data about the kinds of pollution caused by burning coal

The Answer is D) data about the kinds of pollution caused by burning coal

Six years ago, an 80-kw diesel electric set cost $160,000. the cost index for this class of equipment six years ago was 187 and is now 194. the cost-capacity factor is 0.6. the plant engineering staff is considering a 120-kw unit of the same general design to power a small isolated plant. assume we want to add a precompressor, which (when isolated and estimated separately) currently costs $13291. determine the total cost of the 120-kw unit. (hint: skip $ and comma symbols)