According to the Textbook, Why Do Definitions Matter When It

According to the textbook, why do definitions matter when it comes to discussing poverty?

A) because social policies and programs refer to specific definitions to set up criteria for inclusion and exclusion
B) because people need to know how to categorize themselves so they are motivated to work harder
C) because people feel more secure when they know they belong to an identifiable group
D) because people need to be able to compare themselves to others so they understand their position