Explanation:

Let’s break this down:

- C. Wright Mills (Option 2)

- He was an American political sociologist.

- Mills believed sociology should challenge social norms and tackle prejudices.

- To him, all sociology was political.

- His major works: *White Collar* (1951) examines the new American middle class; *The Sociological Imagination* (1959) argues for connecting individual experience with larger social structures.

- R. Dahrendorf (Option 1):

- Known for conflict theory, not the main writer of *White Collar* or *The Sociological Imagination*.

- Talcott Parsons (Option 3):

- Famous for structural functionalism.

- More about social systems and equilibrium, not really about challenging power or prejudice directly.

- R.K. Merton (Option 4):

- Developed theories about social structure and anomie.

- Important for functional analysis, but his focus was not on the political confrontation of sociology.

You nailed it with Mills. He’s the one who saw sociology as a tool to confront and shake up society’s assumptions.