As compared to uniaxial tension or compression, the strain energy stored in bending is only

• A. <img src="/_files/images/civil-engineering/strength-of-materials/142-6.238-1.png">
• B. <img src="/_files/images/civil-engineering/strength-of-materials/56-3.94-3.png">
• C. <img src="/_files/images/civil-engineering/strength-of-materials/56-3.94-1.png">
• D. <img src="/_files/images/civil-engineering/strength-of-materials/56-3.94-2.png">