Which of the following is NOT MENTIONED according to the passage? A. As people get older, they find it unnecessary to get married. B. People who only stay alone in their free time are gener
Which of the following is NOT MENTIONED according to the passage?
A. As people get older, they find it unnecessary to get married.
B. People who only stay alone in their free time are generally not as happy as people who spend more time with their friends.
C. When going to different cities and countries for education and jobs, they also have more chances to make friends
D. More and more people have new friends on social media.