he had witnessed during his World War II service.
The answer to the question is to entertain friends.
If you read the passage, you can see that the text is informal. If addressing people of authority or with a professional stature, you would use a more formal speech. The word "bunch," is a clue that makes the text informal. So this would not be for a potential employer, college professor or to convince the school board.
Answer: A) to become interested in or engaged in something
Explanation:
Meaning of take up-
become interested or engaged in a pursuit.