Concept:Proportional representation links a party's share of seats to its share of the popular vote.Explanation:Seats are not decided by primaries or simply by party membership.Instead, the percentage of votes that a political party wins in the election determines the percentage of seats it gets in the legislature.For example, a party receiving 30% of the votes would roughly receive 30% of the seats.This makes the system different from a winner-takes-all approach.Answer:The correct option is C. the percentage of votes a party receives.