A tour company has organized tours to three different museums. The following is known about those who participated in these tours.
\begin{itemize}
\item 30 people participated in each tour.
\item 10 people participated in all three tours.
\item 33 people participated in at least two tours.
\end{itemize}
Accordingly, how many people participated in only one of the tours?\\
A) 10\\
B) 11\\
C) 12\\
D) 13\\
E) 14