The following reaction proceeds through the intermediate formation of \[RCOOAg+B{{r}_{2}}\xrightarrow{{}}RBr+C{{O}_{2}}+AgBr\]

• A. \[RCO{{O}^{\bullet }}\] 
• B. \[{{R}^{\bullet }}\]
• C. \[B{{r}^{\bullet }}\]                             
• D. All of these