Duverger's Law States That

Duverger's Law states that:

A) Voters will vote for small parties in a SMD plurality system because they believe their vote will help elect that party's candidate.
B) SMD plurality creates a very low de facto threshold, allowing third parties to gain seats proportional to their vote share.
C) Proportional representation electoral systems always lead to a multi-party system, regardless of a country's underlying cleavage structure.
D) SMD plurality systems produce two party systems while proportional representation favours multiparty systems.