To keep the intensity of bearing pressure between the column base and concrete compressive and to vary from zero to , the ratio of the moment M to the axial load P should be

• A. <img src="/_files/images/civil-engineering/steel-structure-design/100-14-92-1.png">
• B. <img src="/_files/images/civil-engineering/steel-structure-design/100-14-92-2.png">
• C. <img src="/_files/images/civil-engineering/steel-structure-design/100-14-92-3.png">
• D. <img src="/_files/images/civil-engineering/steel-structure-design/100-14-92-4.png">
• E. <img src="/_files/images/civil-engineering/steel-structure-design/100-14-92-5.png">