【单选题】

{{I}}Questions 14～16 are based on the following dialogue. You now have 15 seconds to read questions 14～16.{{/I}} Which of the following is not mentioned in the passage

A、American people learn to be independent from childhooD、
B．American people tend to think independently.
C．All theAmerican young people have to move away from their families before 19.
D．American society wants its young people to live independently.