All of the Following About Particulate Air Pollution Is True

All of the following about particulate air pollution is true EXCEPT:

A) Particulate matter includes both primary air pollutants such as soot and lead, as well as secondary air pollutants such as sulfuric acid.
B) Urban areas receive less sunlight than rural areas, partly as a result of greater quantities of particulate matter in the air in urban settings.
C) Microscopic particles are less dangerous than larger particles as trace amounts of hundreds of different chemicals bind to the larger particles and inhaling these particles introduces the chemicals, some of them toxic, deep into the lungs.
D) The Environmental Protection Agency (EPA) samples microscopic particulate matter at 1,000 locations around the United States because its composition varies with location and season.