day | observations
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1| sunny and warm
2|cloudy and rainy
3| drop in temperature
4|clear skies and cold temperature
a student tracks the daily weather the students observations are logged in the table which factor in the atmosphere best explains the students observations
A. a cold front moved into the area.
B. a warm front moved into the area.
C. high levels of moisture are contained within an air mass.
D. a warm air mass replaced a cold air mass.