The distance between the point of intersection of an up grade + g1% and downgrade g2% and the highest point of the vertical curve of length L, is

• A. <img src="/_files/images/civil-engineering/surveying/70-3.282-1.png">
• B. <img src="/_files/images/civil-engineering/surveying/70-3.282-2.png">
• C. <img src="/_files/images/civil-engineering/surveying/70-3.282-3.png">
• D. <img src="/_files/images/civil-engineering/surveying/70-3.282-4.png">
• E. .