【单选题】

{{I}}Questions 14-16 are based on the following passage. You now have 15 seconds to read the questions 14-16.{{/I}} Why doAmerican young people usually leave their families at eighteen or nineteen

A、Their working place is too far away from their families.
B．Their families can not support them.
C．Living independently is considered an importantAmerican value.
D．American young people are forced to live independently.