ACT Problem 44

Act 44
$$\begin{array}{lcl} 44.\;The\;following\;sides\;in\;the\;figure\;above\\ are\;known: AB=18,\;DE=12\;and\;AD=6.\\ AB\;and\;DE\;are\;parallell.\\ What\;is\;the\;length\;of\;DC?\\ \\ (F)\; 8\\ (G)\; 11\\ (H)\; 6\\ (J)\; 12\\ (K)\; 14\\ \end{array}$$