An open class system is based on social mobility that includes a. horizontal mobility. c. intergenerational mobility. b. vertical mobility. d. all of the above

d. all of the above

Ideally, an open class system is based on social mobility that includes horizontal mobility, intergenerational mobility and vertical mobility. Social mobility is an important factor in countries that want to give their citizens equal chances to succeed in life. Social mobility ensures that people can develop their potential and succeed regardless of their origin, their age, their gender, their social class, or any other factor that is outside their control.

the answer wold be b) travel among nations should be regulated by an international organization