Which statement is true regarding advection fog?

The statement regarding advection fog that is true is that it can appear suddenly during day or night and is more persistent than radiation fog. Advection fog occurs when warm, moist air moves over a cooler surface, causing the moisture in the air to condense into fog. This process is not dependent on the time of day, which is why it can form at any time.

Advection fog tends to be more stable and can last longer than radiation fog, which typically forms on clear nights when the ground cools rapidly. The persistence of advection fog is due to continuous air movement, which brings in moist air from other areas, allowing the fog to remain as long as the conditions are favorable.

In contrast to the persistence of advection fog, radiation fog forms and dissipates more quickly, generally relying on calm nighttime conditions to form. Additionally, while advection fog can be associated with different weather patterns, it does not exclusively occur near frontal systems, as it can develop in various temperature and humidity conditions without frontal activity being present.