What is the relation between stress at the tension side and diameter of the fatigue test specimen?

What is the relation between stress at the tension side and diameter o

1.	What is the relation between stress at the tension side and diameter of the fatigue test specimen?
A.	<sub>t</sub> d
B.	<sub>t</sub> d<sup>2</sup>
C.	<sub>t</sub> 1/d<sup>2</sup>
D.	<sub>t</sub> 1/d<sup>3</sup>
Answer» E.