Which of the following changes favour E2 elimination over SN2 for a secondary alkyl halide? (select all that apply)

Elimination has the higher activation energy and gains entropy, so heat favours it. A bulky strong base removes a beta hydrogen rather than attacking carbon, and alcoholic KOH contains the stronger base ethoxide and is less able to solvate and tame hydroxide. Weakly basic, strongly nucleophilic anions push the reaction toward SN2.