$$15-3=12$, $$8\div 2=4$$. $$\text{D}$$． 
David has $$15$$ more candies than Andy at the beginning. David has $$3$$ candies more than Andy after giving some candies to Andy. How many candies does Debbic give to Aiden? 
  * $$10$$ 
  * $$8$$ 
  * $$6$$ 
  * $$4$$ 
  * $$2$$ 