Explanation:

- The embourgeoisement thesis suggests that the working class is becoming more like the middle class. This concept was critically examined and dispelled by John Goldthorpe in 1963.

- Goldthorpe is well-known for his work in sociology, particularly in social mobility and class analysis. He also made significant contributions to rational choice theory.

- Option 1, Max Weber, was primarily known for his theories on bureaucracy and the Protestant work ethic but not for the embourgeoisement thesis or rational choice theory.

- Option 2, Anthony Giddens, is a notable sociologist but more associated with structuration theory and modernity.

- Option 3, Erik Olin Wright, is known for his work on class and economic structures but not directly linked to the embourgeoisement thesis.

Answer: Option 4 - Goldthorpe