Reformer: A survey of police departments keeps track of the national crime rate, which is the annual number of crimes...

Skylar on December 15, 2019

@tomgbean, maybe I can help here.

(C) does not work because an increasing population is accounted for in the national crime rate. As the passage states, this rate is calculated as the annual number of crimes committed per 100,000 people. Therefore, the rate can be calculated and compared despite the total number of people in the population because it is a percentage.

Does that make sense? Let us know if you have any other questions and best of luck with your studies!