C 
Let $X$ be the smallest positive integer, consisting of only the digit $4$ and $9$ (at least one of each), that is divisible by both $4$ and $9$. What is the last four digits of $X$? 
Options:
(a) $$4444$$ 
(b) $$4494$$ 
(c) $$4944$$ 
(d) $$9444$$ 
(e) $$9944$$ 