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What is the correct answer?


Pick up the correct statement from the following:

A. The distance between the points of intersection of the extreme tangents to the transition curve is kept greater than 7500 m × sum of grade changes at the point of intersection

B. The rate of change of grade is limited to 0.3% per 30 m length of the curve

C. According to I.C.A.O. the maximum longitudinal gradient along a runway is limited to 1.5%

D. All the above