To Identify the Most Relevant Disciplines,three Questions Should Be Asked

To identify the most relevant disciplines,three questions should be asked.Which of the following is not one.

A) Does the discipline have a well-defined perspective on the problem?
B) Has the discipline produced a body of research on the problem of such significance that it cannot be ignored?
C) Has the discipline found one or more phenomena directly related to the problem?
D) Has the discipline generated one or more theories to explain the problem?