A particle of mass m is attached to three identical springs A, B and C each of force constant k a shown in figure. If the particle of mass m is pushed slightly against the spring A and released then the time period of oscillations is

• A.            \[2\pi \sqrt{\frac{2m}{k}}\]
• B.            \[2\pi \sqrt{\frac{m}{2k}}\]
• C.            \[2\pi \sqrt{\frac{m}{k}}\]
• D.            \[2\pi \sqrt{\frac{m}{3k}}\]