A Snowline Refers to

A snowline refers to

A) the latitude or elevation at which winter snow accumulates each year.
B) the latitude demarcating the extent of glacial ice during the last glacial maximum.
C) an isoline demarcating the extent of snow or ice on a weather map.
D) the lowest line (latitude or elevation) where winter snow accumulation persists throughout the summer.
E) the elevation at which snow accumulation ceases,marking the uppermost point of a glacier.