The correct answer should be the trait theory
The great man theory is based on the opinion that there were throughout history great men with traits that enabled them to affect the course of history. These traits are responsible for it and without it they wouldn't affect it.
Town lifestyle (I assume you mean by this: a settled lifestyle , so that it contrasts with the nomadic lifestyle) comes with more security: you can store your food reserves and plan for the future.
nomadic lifestyle gives you more flexibility but less security: you can travel elsewhere if your fodosource is runnign low... but usually this is not as good of a food source as a settled lifestyle. One other possible advantage could be being merchants: nomads can benefit from a trade.
C probably if not then sorry
