Explanation:

- Role Taking (Option 3): This is the correct answer. Mead proposed that imagining the situation from another person's point of view involves "role taking." It is the process of adopting the perspective of others, which is fundamental for empathy and social interaction.

- Interactionist (Option 1): Interactionism is a theory that focuses on social interactions and their importance in creating society. It's more about the process rather than a specific skill like role-taking.

- Stigma (Option 2): This refers to a mark of disgrace associated with a particular circumstance or quality, often causing discrimination or exclusion.

- Class (Option 4): This refers to categories of society based on social or economic status, not directly related to Mead's idea.