Jin loves carrots! Yesterday she ate $$\frac{1}{2}$$ of her carrots, and today she ate $$\frac{2}{3}$$ of the remaining carrots. She then discovered that she had $$12$$ carrots left. Yesterday she must have started with  carrots. 
选项为:A:$$36$$  B:$$48$$  C:$$60$$  D:$$72$$  请回答其中一个选项.