Duygu, who starts running on a running course, takes a break to rest after running a certain distance.
After the break, Duygu
\begin{itemize}
\item if she runs 240 meters more, she will have run $\frac{7}{12}$ of the entire course,
\item if she runs $\frac{1}{3}$ of the distance she ran before, she will have run $\frac{3}{5}$ of the entire course.
\end{itemize}
Accordingly, what is the length of the entire course in meters?\\
A) 1440\\
B) 1620\\
C) 1800\\
D) 1980\\
E) 2160