The Temperature Is Nearly Uniform Throughout a Lake

The temperature is nearly uniform throughout a lake

A) during winter when the ice forms an insulating cover.
B) during summer when the sunlight warms the surface and the wind mixes the layers.
C) by the end of the fall and spring overturn.
D) at all times due to winds causing constant mixing of the layers.
E) never.The lake always has different temperature layers and they are reversed in winter and summer.