Aluminium carbide reacts with water according to the equation below. What is the sum of all the coefficients when the equation is balanced?

___ ${\text{A}}{{\text{l}}_{\text{4}}}{{\text{C}}_{\text{3}}}{\text{(s)}} +$ ___ ${{\text{H}}_{\text{2}}}{\text{O(l)}} \to$ ___ ${\text{Al(OH}}{{\text{)}}_{\text{3}}}{\text{(s)}} +$ ___ ${\text{C}}{{\text{H}}_{\text{4}}}{\text{(g)}}$

A.     13

B.     14

C.     19

D.     20

D