m-CPBA is a peracid with a carbonyl group. Explain how the carbonyl weakens the σ bond between the two oxygen atoms, which makes hydroxyl a better-leaving group.

• A. This is by making the oxygen give up a lone pair of electrons.
• B. This is by withdrawing electron density towards it.
• C. This is by straining the bonds with electron density.
• D. This is by withdrawing electron density towards the benzene group.

Answer: (B)