Kangie eats only apples on Monday, Wednesday and Friday. On Tuesdays and Thursdays he eats only mangoes. He eats either 2 apples or 3 mangoes a day. On Saturdays and Sundays he eats nothing. How many pieces of fruit does Kangie eat in two weeks? 
选项为:A:$$12$$  B:$$16$$  C:$$18$$  D:$$20$$  E:$$24$$  请回答其中一个选项.