The correct options are
A Caribou fawnskin is preferred in the winters.
C The men's parka has long flaps in the front and at the back.
The Eskimos wear boots called mukluks and parkas - all made of animal skins. There are differences in the details of clothing for men and women. The men's parka has long flaps in the front and at the back. Caribou fawnskin is preferred in winter because it is soft and warm. Coastal groups prefer seal skin in late spring and summer. It has the advantage of being waterproof, but it has the disadvantage of being very stiff.