The intensity of vertical pressure at a depth Z directly below the point load Q on its axis of loading is :

• A. <img src="/_files/images/civil-engineering/soil-mechanics-and-foundation-engineering/48-11-248-1.png">
• B. <img src="/_files/images/civil-engineering/soil-mechanics-and-foundation-engineering/48-11-248-2.png">
• C. <img src="/_files/images/civil-engineering/soil-mechanics-and-foundation-engineering/48-11-248-3.png">
• D. <img src="/_files/images/civil-engineering/soil-mechanics-and-foundation-engineering/48-11-248-4.png">