Explanation:

Let’s break it down:

- Karl Marx: Classic conflict theorist. Saw stratification as rooted in class conflict between bourgeoisie (owners) and proletariat (workers).

- R. Dahrendorf: Also conflict theory. He updated Marx, talking about authority and power struggles, not just class.

- C. W. Mills: Conflict perspective, especially with his “power elite” idea. He looked at struggles between different groups holding power in society.

- M. Weber: This is where it gets interesting. Weber didn’t *only* look at conflict. He believed in a multidimensional approach—class, status, party. He goes beyond Marx but incorporates conflict elements. Still, he's not as squarely in the "conflict approach" as the others.

So, the correct answer is:

Option 4: M Weber