(i) Pick out the most stable conjugate base among the following.
(ii) Which structural feature(s) did you analyze?

• A. (i) Structure (b) is the more stable conjugate base.
  (ii) Electronegativity.
• B. (i) Structure (a) is the more stable conjugate base.
  (ii) Inductive effect.
• C. (i) Structure (b) is the more stable conjugate base.
  (ii) Hybridization.
• D. (i) Structure (a) is the more stable conjugate base.
  (ii) Resonance.