Выбрать грамматически правильный вариант: a) You can't get a cash prize unless you get good results in your tests b)You can get a cash prize unless you get good results in your tests c)You didn't get a cash prize unless you did...

Выбрать грамматически правильный вариант: a) You can't get a cash prize unless you get good results in your tests b)You can get a cash prize unless you get good results in your tests c)You didn't get a cash prize unless you didn't get good results in your tests d)You haven't get a cash prize unless you get good results in your tests