What is shear lag effect?

• A. the phenomenon of non uniform bending stress not due to influence of shear strain induced on bending stresses in flanges
• B. the phenomenon of uniform bending stress not due to influence of shear strain induced on bending stresses in flanges
• C. the phenomenon of uniform bending stress due to influence of shear strain induced on bending stresses in flanges
• D. the phenomenon of non uniform bending stress due to influence of shear strain induced on bending stresses in flanges