Answer: Upper class is often defined as having control over one's life and the lives of people around you, while the middle class is often defined as having control only over one's own life.
Explanation:
Social class is used in a society to group people into social categories which is hierarchical. The Mena geouing are the lower, middle and the upper classes.
A sociologist supposed to determine whether their subjects are in the upper class or the middle class as the upper class is often defined as having control over one's life and the lives of people around you, while the middle class is often defined as having control only over one's own life.