A ball collides with a fixed inclined plane of inclination \[\theta \]after falling through a distance\[h\]? If it moves horizontally just after the impact, the coefficient of restitution is

• A. \[\tan \,\theta \] 
• B. \[{{\tan }^{2}}\,\theta \]
• C.  \[{{\cot }^{{}}}\,\theta \]        
• D. \[{{\cot }^{2}}\,\theta \]