Latex - Parentheses for sections in a table

Question

I want to create a table like this: Table with parentheses

But I don't know how to add the parentheses, here's my code:

\section{Table}
\subsection{Normal table}
\begin{center}
\begin{tabular}{ c c c }
 & C & D \\ 
 C & R & S \\ 
 D & T & P \\  
\end{tabular}
\end{center}

It looks like this: My table

Many thanks!