if the snowfall set a record if the snowfall was unusual for the area if the snowfall was consistent with weather in December over time if the snowfall remained on the ground for longer than one month
I gave my students this multiple choice 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?

Only one answer is correct among these 4 choices:
- if the snowfall set a record
- if the snowfall was unusual for the area
- if the snowfall was consistent with weather in December over time
- if the snowfall remained on the ground for longer than one month

Could you tell me which one is correct?

if the snowfall was consistent with weather in December over time