When an area is experiencing several consecutive days of rather constant weather, it is probably )warm-front weather b)cold-front weather c)air-mass weather d)occluded front weather

It is probably C. air-mass weather.

Explanation:

It is called air-mass weather to a volume of air with uniform climate conditions that contains steam and covers several kilometers and can be extended to the atmosphere. They can be classified according to their altitude, temperature or origin; They can be continental or maritime, polar or tropical. If two air masses of different temperatures come together, a "boundary" called the front is formed.

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