48. The conversion of acetaldehyde to 2-hydoxypropanoic acid is best accomplished with
(A) 1. CH₃Li; 2. CrO₃, H₂SO₄
(B) 1. NaCN; 2. H₃O⁺ , heat
(C) 1. SOCl₂; 2. Mg, ether; 3. CO₂
(D) 1.Br₂, PBr₃; 2. NaOH
(E) 1, diazomethane; 2. H₃O⁺

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