Your Family Business Operates a Chain of Cafés and Restaurants

Your family business operates a chain of cafés and restaurants across three cities. Your uncle has been the company CEO for the last 20 years, and has announced he is planning to retire next year. He discusses his concerns with you.
-He tells you about the low rates of successful transfer between generations, and that only ______ percent of family businesses make it to the third generation.

A) 30-40
B) 20-30
C) 5-10
D) 40-50
E) 10-20