A lift accelerated downward with acceleration 'a'. A man in the lift throws a ball upward with acceleration \[{{a}_{0}}({{a}_{0}}

• A.             \[(a+{{a}_{0}})\] upward
• B.               \[(a-{{a}_{0}})\] upward
• C.             \[(a+{{a}_{0}})\] downward           
• D.             \[(a-{{a}_{0}})\] downward