Pick up the correct statement for horizontal photographs. A. Parallel lines do not appear parallel in central projection B. The two sides of a road meet at the vanishing point C. The lines parallel to the negative plane are projected as parallel lines D. All the above

The correct answer is D. All of the above.

In central projection, parallel lines do not appear parallel. This is because the lines are projected onto a flat surface, and the surface is not parallel to the lines. The two sides of a road, for example, will appear to meet at a point in the distance, called the vanishing point. The lines parallel to the negative plane, which is the plane that the camera is facing, will be projected as parallel lines.

Here is a diagram to illustrate this:

[Diagram of a road with two parallel lines converging at a vanishing point]

The two parallel lines on the road converge at a point in the distance, called the vanishing point. This is because the lines are projected onto a flat surface, and the surface is not parallel to the lines.

The lines parallel to the negative plane, which is the plane that the camera is facing, are projected as parallel lines. This is because the lines are parallel to the plane of projection.

I hope this explanation is helpful!