Mill's Method of Agreement Helps to Identify Causes by Looking

Mill's method of agreement helps to identify causes by looking for:

A) the factor that most people agree is responsible for the effect
B) the factor that most experts agree is responsible for the effect
C) an explanation that is agreement with other known cause/effect relationships
D) a common factor that is present in all the cases in which the effect occurs
E) a common factor that is present throughout the whole world