The following reaction is catalyzed by $Br^-_{(aq)}$: $2H_2O_{2(aq)} \rightarrow 2H_2O_{(l)} + O_{2(g)}$. What type of catalysis is this?

• A
  Homogeneous catalysis
• B
  Heterogeneous catalysis
• C
  Autocatalysis
• D
  None of the above