题目

On Christmas Day, a young man, tall and thin with dark hair, was making his way south on Interstatete（洲际的） 85 just below High Point, North Carolina，trying to hitch_a_ride. He hadn't been home for two years: his family not had heard nothing from him. He and his mother had fight before, and he set off across the country，going from town to town, from one job another. However, now he was ready to return home. A ride was hard to find.  For half a day no car was seen to have run past him. “Mom，” he said to himself, “I'm tired and hungry, but I'm coming home.” The cold“”是“”的（　　） Ａ．充分而不必要条件            Ｂ．必要而不充分条件 Ｃ．充分必要条件                Ｄ．既不充分也不必要条件