A steel rod specimen having a gage length of ( ,) mm, and an original cross-sectional area of (A mne was subjected to a tensile force of PKN) renuhting in a stres fuat in less than the yield stress. The final length of the specimen is (/) mm. The Modulus of Elasticity is: PI a) E= Pl. b) E= A, c) E= PAI PA d) E= Alo PA. ej E=