Consider the system of two wagons shown in the figure. The natural frequencies of this system are

• A. 0, \(\sqrt{\frac{{2k}}{{m}}}\)
• B. \(\sqrt{\frac{{k}}{{m}}}\) , \(\sqrt{\frac{{2k}}{{m}}}\)
• C. \(\sqrt{\frac{{k}}{{m}}}\) , \(\sqrt{\frac{{k}}{{2m}}}\)
• D. 0 , \(\sqrt{\frac{{k}}{{2m}}}\)