Which of the following statements illustrates the impact of the reform era (1900–1920) on US political parties? A) Reforms strengthened the ability of political parties to hold officeholders accountable.

B) Reforms limited the power of political parties by reducing the number of government positions they controlled.

C) Reforms led parties to reduce the influence of party bosses by using nominating conventions to choose their candidates.

D) Reforms led political parties to reduce voter requirements, making it easier for people to participate in elections.