A body executes simple harmonic motion under the action of a force \[{{F}_{1}}\] with a time period \[\frac{4}{5}\]s. If the force is changed to\[{{F}_{2}}\], it executes S.H.M. with time period - s. If both the forces \[{{F}_{1}}\] and \[{{F}_{2}}\] act simultaneously in the same direction on the body, its time period in second is

• A. \[\frac{12}{25}\]
• B. \[\frac{7}{5}\]
• C. \[\frac{24}{25}\]
• D. \[\frac{5}{7}\]