The correct options are
A Strong cold winds blow and there is snowfall.
C The whole region becomes dark, deserted and desolate.
Tundra winters have no sunlight throughout November, December, and January. It is bitterly cold during these months. In this extreme cold, the water of the rivers, lakes, seas freezes. Strong cold winds blow and there is snowfall. The whole region becomes dark, deserted, and desolate.