What statement best explain why lake effect snow decreases when lakes freeze gradually?

Lake effect snow decreases when lakes freeze gradually because the ice cover limits the interaction between the relatively warm lake water and the cold air above. As the ice forms, it prevents evaporation, which is essential for generating the moisture needed for snowfall. Additionally, a frozen lake cannot release heat, reducing the temperature contrast that drives the lake effect snow phenomenon. Thus, with less evaporation and heat available, the snow production diminishes.