13. which of the following statements about party identification is true? a. pollsters did not measure independent as a form of identification until early in the twenty-first century. b. currently, more people identify as republicans than as democrats. c. currently, more people identify as democrats than as republicans. d. over the last several decades, the percentage of people identifying as republicans has increased substantially. e. over the last several decades, the percentage of people identifying as independents has increased substantially.