A horizontal beam with square cross-section is simply supported with sides of the square horizontal and vertical and carries a distributed loading that produces maximum bending stress \[\sigma \] in the beam. When the beam is placed with one of the diagonals horizontal the maximum bending stress will be:

• A. \[\frac{1}{\sqrt{2}}\sigma \]
• B. \[\sigma \]
• C. \[\sqrt{2\sigma }\]
• D. \[2\sigma \]