Why Is It Sometimes Difficult for Sociologists to Define Sociology

Why is it sometimes difficult for sociologists to define sociology in short, simple terms?

A) Unlike other social scientists, sociologists do not use mathematical models to solve problems.
B) Unlike other social scientists, sociologists do not have an established set of ideas that make up their theoretical core.
C) Unlike other social scientists, sociologists do not define themselves according to a specific institution or area of life.
D) Unlike other social scientists, sociologists do not publish their own academic journals.