Under What Conditions Would the Reaction Be Most Likely to Proceed

Under what conditions would the reaction be most likely to proceed to the product shown at a reasonable rate? (Select one.)

A) in a hydrocarbon solvent such as hexane
B) in ethanol solvent
C) in an ethanol solvent containing some water
D) in very dry dimethyl sulfoxide (DMSO, a polar aprotic solvent) containing a K⁺-bonding crown ether
E) in dimethyl sulfoxide containing a trace of water and a K⁺-bonding crown etherf.
in water containing enough acetone to dissolve the alkyl halide, plus a K⁺-bonding crown ether