Answer:
The options are
a. prevent party leaders from amending campaign platforms
b. increase the influence of business owners on regulatory legislation
c. promote the principle of direct democracy
d. limit the use of judicial review by circuit courts
The answer is
c. promote the principle of direct democracy
Step-by-step explanation:
The Progressive Era between 1890s to 1920s was known for extensive social activism and political reform in the United States.
The main aim of the Progressive movement includes removing corruption in government. Such corrupt practices include bribery,unequal rights as a result of wealth and influence.By doing this,the principle of direct democracy was promoted.