$2 + 4 + 8 = 14$ 
Arthur decided to lose weight. On the first month, he lost $2$ kg. He decided that each month he would be losing twice as much kilograms as the month before. How many kilograms did Arthur lose in total in the first three monthes? 

[A] $$2$$ 
[B] $$6$$ 
[C] $$8$$ 
[D] $$12$$ 
[E] $$14$$ 