Question: On December 12th a snowstorm in a city produced 20 centimeters of snowfall. When can this event be used to describe the climate of the region?

  Options: 
 A. if the snowfall set a record
 B. if the snowfall was unusual for the area
 C. if the snowfall was consistent with weather in December over time
 D. if the snowfall remained on the ground for longer than one month 
Answer: C