Ha-Joon Is Visiting the United States for the First Time

Ha-joon is visiting the United States for the first time. Which of the following would be an example of a productive stereotype?

A) "Americans eat terrible food. I should bring some ingredients from home."
B) "Americans care only about money. Talking about money is a good way to get their attention."
C) "Americans generally look down on other cultures and like to feel superior."
D) "Americans like it when you act like you are old friends, even if you just met."
E) "Americans love guns, so it is important to be alert at all times."