Mill's Method of Concomitant Variations Helps to Identify Causes by Observing

Mill's method of concomitant variations helps to identify causes by observing:

A) whether adding additional factors results in an increase or decrease in the effect
B) whether an increase or decrease in the suspected cause results in an increase or decrease in the effect
C) a larger sample of instances
D) a more diverse sample of instances
E) whether the effect varies over time, while the suspected causal factor remains the same