Explanation:

- Option 1: Young and Mack

- No major theories from Young and Mack are expressly about direct and indirect cooperation.

- Option 2: MacIver and Page

- Correct Answer: MacIver and Page introduced the concept of direct and indirect cooperation.

- They explored complexities in social structures, focusing on how individuals collaborate directly and through intermediaries.

- Your answer is right.

- Option 3: Levi Strauss

- He was a cultural anthropologist known for structural anthropology, not for direct and indirect cooperation.

- Option 4: Park and Burgess

- They were involved in the development of urban sociology and the Chicago School, but not specifically known for work on direct and indirect cooperation.

By selecting option 2, you recognized MacIver and Page's significant contributions to sociology!