Which of the Following Is a Weakness of Functional Definitions

Which of the following is a weakness of functional definitions of religion?

A) The range of behaviors and ideas that might be considered "religious" may be so broad that it is hard to keep a clear focus on what is included; almost anything might be religious or quasi-religious.
B) Functional definitions tend to focus almost entirely on very traditional expressions of religion.
C) Functional definitions are not good at recognizing the dynamic character of religion as new forms or types of religiosity emerge in a society.
D) Functional definitions have a conservative bias, with a tendency to stigmatize new religions as less religious.