Social Mobility -Which Is Not an Example of Intergenerational Mobility

Social Mobility
-Which is not an example of intergenerational mobility?

A) Jeff's family has maintained wealth for many generations, but Jeff has fallen into poverty.
B) Lisa works as a bank manager at the same bank where she started as a teller ten years ago.
C) Sara is a doctor, while her parents were both low waged factory workers.
D) James comes from a line of coal miners, but worked hard to pursue an advertising career.
E) Tim now owns the grocery store chain at which his father worked for many years.