\textbf{94-} \textbf{The passage suggests that the belief that animals may also be able to recognize facial expressions ----------.}
\begin{enumerate}
\item[1)] proves that they understand what each facial expression means
\item[2)] holds true in relation to trained, but not untrained, birds
\item[3)] was supposed to be wrong
\item[4)] is a long-held one
\end{enumerate}