Which of the following reaction sequences would be the best for the synthesis of $t$-butyl alcohol?
- A$CH_3MgBr + HCHO$ $\xrightarrow{Et_2O}$ $\xrightarrow{H_3O^{+}}$
- B$CH_3CH_2CH_2MgBr$ $\xrightarrow[Et_2O]{CO_2}$ $\xrightarrow{H_3O^{+}}$
- C$CH_3MgBr + CH_3COCH_3$ $\xrightarrow{Et_2O}$ $\xrightarrow{H_3O^{+}}$
- D$CH_3CH_2MgBr + CH_3CHO$ $\xrightarrow{Et_2O}$ $\xrightarrow{H_3O^{+}}$
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