The correct options are
A as there is no sunlight for six months
D as there is huge amount of ice, which makes the region too cold to live.
Humans find it diffcult to settle in Antarctica due to extreme weather conditions. A day in Antarctica stretches for six month and a night also stretches for six months. A major part of Antarctica is covered in ice sheet which makes the place too cold to live. Due to ice and negligible of sunlight, very few plants can grow. People involved in research activities have the option of eating seafood mostly, which is in abundance there.