\textbf{178.} In the figure below, a charge $q = -50\,\mu\text{C}$ enters point A with an electric potential of 120 V and the electric potential energy changes by $5\,\text{mJ}$. What is the electric potential at point B?
\textit{[Figure: Point A with arrow indicating direction of $\vec{E}$, point B below]}
\begin{itemize}
\item[(1)] 70
\item[(2)] 110
\item[(3)] 130
\item[(4)] 220
\end{itemize}