Duverger's Law states that a) proportional representation systems result in two-party systems. b) one-party systems are the result of white flight. c) single-member district systems result in two-party systems. d) presidential Republicanism results in ticket splitting.

c) single-member district systems result in two-party systems.

Explanation:

Duverger's Law -

This law was given by the french sociologist, Maurice Duverger in 1950s,

according to law, the single - member districts tends to favor the two - party system, but in the proportional representation and the double ballot majority system tends to favor the multipartism.

Hence, from the statements given in the question, the correct statemnet fro the Duverger's law is (c).