What is crossover voting, and why is it relevant in open-primary systems?

• A. Crossover voting is voting for a third-party candidate only; it is not allowed in open primaries.
• B. Crossover voting is voting in another party's primary; it can influence nominee outcomes in open-primary systems.
• C. Crossover voting is casting a ballot for nonpartisan offices only; it prevents party influence.
• D. Crossover voting is voting multiple times in the same election; it is illegal.

Answer: (B)