Which combination of reactants is best to prepare methyl isopropyl ether CH₃OCH(CH₃)₂ ?
A. CH₃MgBr and (CH₃)₂CO
B. CH₃O⁻Na⁺ and (CH₃)₂CHBr
C. CH₃Br and (ch₃)₂CHO⁻Na⁺
D. CH₃CHO⁻ and CH₃MgBr