The scale of a tilted photograph of focal length f, taken from an altitude H, along the plate parallel through plumb point, is

• A. <img src="/_files/images/civil-engineering/advanced-surveying/91-4.136-1.png">
• B. <img src="/_files/images/civil-engineering/advanced-surveying/91-4.136-2.png">
• C. <img src="/_files/images/civil-engineering/advanced-surveying/91-4.136-3.png">
• D. <img src="/_files/images/civil-engineering/advanced-surveying/91-4.136-4.png">