Working shorter workweeks causes managers to feel less stress than does working longer workweeks. In addition, greater perceived control over one's work life reduces stress levels. It can be concluded, therefore, that shorter workweeks cause managers to feel they have more control over their work life.

The argument made above uses which of the following questionable techniques?

(A) Associating two conditions as cause and effect on the basis of their being causally associated with the same phenomenon

(B) Taking for granted that two factors that have a certain effect individually produce that effect more strongly when both act together.

(C) Assuming what it sets out to prove

(D) Using an irrelevant point in order to draw a conclusion

(E) Basing a conclusion on preconceived views about the needs of managers