Select the Williamson syntheses that give the stated ether as the major product.

Asodium 2-methylpropan-2-oxide $+$ iodomethane $\to$ 2-methoxy-2-methylpropane
Bsodium phenoxide $+$ bromoethane $\to$ ethoxybenzene
Csodium methoxide $+$ 2-bromo-2-methylpropane $\to$ 2-methoxy-2-methylpropane
Dsodium ethoxide $+$ bromobenzene $\to$ ethoxybenzene

Answer: A, B

Both successful routes combine a (aryl or tertiary) alkoxide with an unhindered primary/methyl halide for SN2. The tertiary bromide with methoxide undergoes E2 to 2-methylpropene, and an unactivated aryl halide does not undergo nucleophilic substitution with ethoxide.

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