Concept:Gerrymandering is the deliberate redrawing of constituency boundaries to favour a political party or group.Explanation:The word in the question describes manipulating electoral boundaries to gain more seats.Legitimate boundary-setting is called delimitation, but it is not done unfairly.Gerrymandering, however, specifically involves drawing these boundaries to create an unfair political advantage.This matches the definition given in the question.Answer:D. Gerrymandering