- Assimilation (A): This is the process by which a minority group adopts the customs and norms of the dominant culture, leading to cultural change.
- Enculturation (B): This refers to the process by which individuals learn and adopt the values and behaviors of their own culture, which leads to internal cultural change.
- Diffusion (C): This is the spread of cultural elements (ideas, practices, or products) from one society to another, often leading to cultural change through borrowing.
- Revolution (D): While revolution can lead to societal or political change, it does not specifically refer to cultural change, which occurs over time through processes like assimilation, diffusion, and enculturation.
Step 1: Understanding the processes of cultural change.
Cultural change can occur through various processes such as the spread of ideas (diffusion), the blending of different cultures (assimilation), and learning cultural norms (enculturation).
Final Answer:
\[
\boxed{\text{The correct answer is (4) (A), (B) and (C) only.}}
\]