Nucleophilic Substitution vs. Elimination in 2-Bromobutane Reaction

In organic chemistry, nucleophilic substitution and elimination reactions are crucial for understanding molecular transformations. Consider the following scenario: You are tasked with determining the predominant reaction type that occurs when 2-bromobutane reacts with sodium hydroxide in ethanol at elevated temperatures. The structure of 2-bromobutane is as follows:

Given the basic nature of sodium hydroxide and the heat applied during the reaction, which of the following options represents the likely major product of this reaction?