\textbf{151.} In the figure below, the radius of the circle is 3 units. What is the measure of arc $\widehat{EDC}$ in degrees?
\textit{[Figure: Circle with center O, points A, B, C, D, E on the circle, angle at B is $70°$]}
\begin{itemize}
\item[(1)] $80°$
\item[(2)] $90°$
\item[(3)] $100°$
\item[(4)] $120°$
\end{itemize}
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