Which type of voting is based on what a citizen perceives is in their best interest?

Rational choice voting refers to a method where voters make decisions based on their personal preferences and beliefs about what policies or candidates will best serve their interests. This approach suggests that individuals assess the potential outcomes of their vote, considering how each option aligns with their own values, needs, and expectations for the future. Voters weigh the benefits and costs associated with each candidate or policy to make a choice that they believe will yield the most favorable results for themselves.

In contrast, retrospective voting focuses on evaluating the past performance of incumbents and parties, while prospective voting looks ahead to future scenarios and promises. Party-line voting emphasizes loyalty to a political party rather than individual assessments of candidate merits. Therefore, rational choice voting encapsulates the essence of decision-making based on individual interests, making it the correct answer in this context.