A block of mass m moving with a velocity \[{{v}_{0}}\]on a smooth horizontal floor collides with a light spring of stiffhess k that is rigidly fixed horizontally with a vertical wall. If the maximum force imparted by the spring on the block is F, then

• A. \[F\propto \sqrt{m}\]
• B. \[F\propto \sqrt{k}\]
• C. \[F\propto {{v}_{0}}\]
• D. None of these