Metal ions can increase the rate of decarboxylation for certain compounds. Explain how this catalysis occurs.

• A. Metal ions catalyze decarboxylation by performing a nucleophilic attack to the leaving CO₂.
• B. Metal ions catalyze decarboxylation by forming a complex with CO₂, making it easier to remove.
• C. Metal ions catalyze decarboxylation by facilitating easier delocalization of the electrons left when CO₂ is removed.
• D. Metal ions catalyze decarboxylation by facilitating easier delocalization of the electrons when CO₂ is added.

Answer: (C)