Answer: B. a lower per capita income.
Explanation:
Per capita income refers to a measure of economic development that divides a nation's GDP by the population of the country. It is meant to show in theory, the amount of wealth that each person in the country has.
A developed country like the United States would have a very high GDP which when divided by the population of the U.S. would give a higher per capita income. This is unlike a developing country that would have a lower GDP and by extension, a lower per capita income as well.
The main difference between the Sophists and the other philosophers is that the Sophists were essentially rhetoric teachers, while the other philosophers were more interested in seeking the truth.
The Sophists were rhetoric teachers, and their focus was on the art of persuasion by using language. They were wise, intellectual people, and they were trying to use and teach their abilities of persuasion by using language to the wider masses.
The philosophers, on the other hand, were focused on knowing the truth, they wanted to be wiser by knowing the truth instead of dogmatically stand by the false beliefs. So they were trying to teach the wider masses the ways as to how to come to the truth and wisdom.