Which of the Following Could Be Used to Prepare Stearic

Which of the following could be used to prepare stearic acid,CH₃(CH₂) ₁₆COOH?

A) CH₃(CH₂) ₁₅CH₂Br,CN^-,heat; then H₃O⁺,heat
B) CH₃(CH₂) ₁₅CH₂Br,Mg,(C₂H₅) ₂O; then HCHO; then H₃O⁺
C) CH₃(CH₂) ₁₆CH₂Br,NaOH; then KMnO₄,OH^-,H₂O; then H₃O⁺
D) CH₃(CH₂) ₁₅CH₂Br,CN^-,heat; then H₃O⁺,heat and CH₃(CH₂) ₁₅CH₂Br,Mg,(C₂H₅) ₂O; then HCHO; then H₃O⁺
E) CH₃(CH₂) ₁₅CH₂Br,CN^-,heat; then H₃O⁺,heat and CH₃(CH₂) ₁₆CH₂Br,NaOH; then KMnO₄,OH^-,H₂O; then H₃O⁺