What is the term for a large group of people with similar characteristics such as educational background and income level?
a. an interest group
b. a social class
c. a political party
d. a social culture

The correct answer is B, a social class. 'Interest groups' have the same interest that influences them. "A political party' is about politics. And D isn't correct as this is not a culture, it is merely a class.

Ceuphemism hope it