What is the product of the addition of chlorine, ${\text{C}}{{\text{l}}_{\text{2}}}$, to propene, ${{\text{C}}_{\text{3}}}{{\text{H}}_{\text{6}}}$?

A.     1,1-dichloropropane

B.     2,2-dichloropropane

C.     1,2-dichloropropane

D.     1,3-dichloropropane

C