Answer:
The correct answer would be D, Adaptability.
Step-by-step explanation:
A successful businessman is a person who faces difficult situations and adapt himself according to the new situations and finds out a way to deal with it. He may encounter a situation which is not so convenient to him, but he adapts himself to cope up with such situation. So a successful businessman has an important trait or quality of Adaptability. He adapts himself according to the fast changing environment and takes efficient decisions accordingly. Perseverance, Friendliness and intelligence are also part of a successful businessman's traits, but Adaptability makes him handles the most uncomfortable and fast changing situations.