Given the product of three numbers, the smaller the difference, the smaller the sum. $6\times6\times6=216$, so the answer is $6\times 12=72.$ 
The volume of a cuboid is $216$. What is the least sum of the length of all its edges? 
Options:
a: $$216$$ 
b: $$32$$ 
c: $$72$$ 
d: $$96$$ 
e: $$120$$ 