$$76=10+10+10+10+10+10+10+6$$ 
Tom goes to the supermarket to buy egg tarts. There are two kinds of egg tarts. One has $$6$$ tarts in the box and the other has $$10$$ tarts in the box. The unit price of the egg tarts is the same. If Tom wants $$76$$ egg tarts, how many boxes does he need at least?~(adapted from 2011 Math Kangaroo Problem, Level 3 - 4, Question \#10) 

[a] $$5$$ 
[b] $$8$$ 
[c] $$9$$ 
[d] $$11$$ 
[e] $$13$$ 