The value of kv in the elastic critical shear stress equation for c/d < 1 is given by

• A. 4.0 – [5.35/(c/d)].
• B. 4.0 + [5.35/(c/d)2].
• C. 5.35 + [4/(c/d)2].d) 5.35 – [4/(c/
• D. ].b) 4.0 + [5.35/(c/d)2].c) 5.35 + [4/(c/d)2].d) 5.35 – [4/(c/d)].