\item \lect Considering the \textit{Congruence Closure} algorithm, tick all items that are \texttt{true}

\begin{itemize}
\item[$\square$] In the last step, all equalities from the conjunction of literals are checked against the merged congruence classes.
\item[$\square$] Classes are merged, if they contain common terms.
\item[$\square$] All terms for which there is a negative equality in the conjunction of literals are put into the same congruence class. 
\item[$\square$] Classes are merged, if two classes both contain an instance of the same uninterpreted function.
\end{itemize}