The map below shows the State and Local Air Monitoring Stations (SLAMS). Each red dot represents one of nearly 4,000 air quality monitoring stations in the SLAMS network. Data from these stations is compiled so that levels of air pollutants can be assessed by the Environmental Protection Agency.

Image courtesy of the EPA

Suppose that recent data from the SLAMS network showed a general rise in air pollution levels. What would such data most likely suggest?
A.
That stricter air quality controls are necessary to reduce emissions.
B.
That air quality controls are no longer needed to reduce emissions.
C.
That the SLAMS network as a whole is not functioning properly.
D.
That air quality controls need to be relaxed to reduce emissions.