Compound A shown below can be prepared from a suitable alkyl halide and an appropriate reagent under suitable conditions. The most appropriate combination of the requirements to give the highest yield is

A

1-bromo-1-methylcyclohexane , $$CH_3O^-, CH_3OH$$

B

1-fluoro-1-methylcyclohexane $$CH_3O^-, CH_3OH$$

C

1-bromo-1-methylcyclohexane $$(CH_3)_3CO^-, (CH_3)_3COH$$

D

1-fluoro-1-methylcyclohexane $$(CH_3)_3CO^-, (CH_3)_3COH$$