If sec-butyl-ethyl ether were synthesized by a williamson synthesis, which combination would give the best results with the least amount of elimination?

If sec-butyl ether were synthesized by a Williamson synthesis, the combination that would give the best results with the least amount of elimination is (b) using sodium sec-butoxide and Bromoethane. Since bromoethane is an alkyl halide with the halogen attached at the terminal of the compound. 

They are like other investigations? say there was a murder u have to do blood test and finger prints which run through a lab.