What is the best choice of reagent(s) to achieve the following transformation?

Question

Quizplus · Accepted Answer

The use of Grignard reagents (in this case, CH3MgBr) is a common method for introducing alkyl groups onto carbonyl compounds. The resulting alcohol can then be converted to the desired ether using a reagent such as H2SO4, which in this case is represented as HSOS=O. LiAlH4 is a reducing agent that can also reduce carbonyl compounds to alcohols, but in this case, the use of a Grignard reagent is a more efficient and selective approach. The other options involve more complex reagents or less efficient methods for achieving the desired transformation.

What Is the Best Choice of Reagent(s) to Achieve the Following