The answer is "A. Cross-country skiing".
Cross-country skiing is a type of skiing where skiers depend alone headway to move crosswise over snow-shrouded landscape, instead of utilizing ski lifts or different types of help. Cross-country skiing is broadly polished as a game and recreational action; notwithstanding, some still use it as a methods for transportation. Variations of cross-country skiing are adjusted to a scope of landscape which traverses unchanged, now and then sloping territory to prepared courses that are explicitly intended for the sport.