In Summarizing the Concept of Democracy That It Thinks Is

In summarizing the concept of democracy that it thinks is necessary to evaluate a political system, the text lists three elements that must be addressed.
(a) The first of these elements "concerns the need for procedures to ensure the full and fair expression of political views (especially unpopular ones) and strict adherence to rules for electing representatives." What does the book state about the U.S. record on this issue? What evidence and arguments does the book present in support of this statement?
(b) The second element "assesses whether political leaders broadly reflect major social identities based on class, race, ethnicity, religion, gender, and region." What is the book's assessment of how the United States is doing on this issue?
(c) The third element "focuses on effective political responsiveness" and "the requirement that representatives promote the interests of their constituents." What is the book's assessment of how the United States is doing on this issue?