Question 973437
The line of sight is the hypotenuse of a right triangle.  One leg is the vertical distance from the ground, the other leg is the horizontal distance, what is wanted, and the angle of 35 degrees has a tangent=1600/x

tan35=1600/x
x=1600/tan 35
tan 35 is 0.700

x=2285.03 feet
D is the answer

Draw a diagram (which I can't do here).  It is very difficult to do this without a picture.