AMC 8 2011 Problem 6

In a town of $351$ adults, every adult owns a car, motorcycle, or both. If $331$ adults own cars and $45$ adults own motorcycles, how many of the car owners do not own a motorcycle? $\textbf{(A)}\ 20 \textbf{(B)}\ 25 \textbf{(C)}\ 45 \textbf{(D)}\ 306 \textbf{(E)}\ 351$